Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8bf21bac324325…

MALICIOUS

PDF

85.1 KB Created: 2021-07-02 10:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: edb6d34e97c391e4b403d3dc041df70f SHA-1: 8297510e74bd71633d50220f1dff8fc0e332506d SHA-256: 6d8bf21bac3243255be9fd357584c33b15f0f69319bbb5a0d7a130e8e42b66b6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to host malicious content or redirect users to phishing pages. The PDF structure itself is minimal, with the primary function appearing to be a link farm designed to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://queure.ru/uplcv?utm_term=space+gangster+2+mod+apk+android+1 PDF link annotation
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/43i5l5ic43j1a59n7nki1kmoq6/vojetuxi.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/6a452bd3921fa7dec0127007fcd48a70/ratelew.pdfIn PDF document text
    • https://seitonsolutions.com/ci/files/235107207.pdfIn PDF document text
    • http://championsview.net/userimages/59130345214.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/a8e43e402df4a4163fec03a2e7ccd112/nobagevovenenularivamogaf.pdfIn PDF document text
    • https://morabia.fi/images/file/59157099703.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/xabaginiwezedowigop.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/e69aa3a6bca463c6f508e85243b0dbb0/xuvikovudosaledo.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084aef3b1daf---widaposivozibojapime.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b23041759b3---kalaluvopebo.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/jkr89t4r7g38v67gfl31gjrghl/84114514264.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/70567cceec0309ea2aa2cd9afddfe8e8/83265990468.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/da81e995e5d193d16201f4eac4be261d/91370473372.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e6004243f---nilodabopibobezopuko.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/s1lreukkk47thjjm4nor6lk302/fopujusenejawijazesaj.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/04b37b87cc32f4c53697b307225de39e/vebum.pdfIn PDF document text
    • http://northstarbaptisttyler.com/clients/a/a4/a4b4c2e389351fb2dee96c3f727c6a57/File/zefawatuxedorimodedotudi.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/2b2a93901c52516c73bd7e7e2a1b88cd/toladuwatawiniton.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fecf349b08---99607155750.pdfIn PDF document text
    • http://phuongninhphat.com/uploads/userfiles/file/48789129307.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/97520053196.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea07801108---podilekizaloj.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/55768491175.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9a0c798c5f---vuxavinivifawixatolarama.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1621695758.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/16946044316.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F1 31744 bytes
SHA-256: 85de34e480455abb66a816edae8b37e4771f4306fa33b82bd48b97a481b0d0e1
font_02_sfnt_off00012b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7A 11148 bytes
SHA-256: 17392ac30800938acef27aeba85e9f0bda29307447b9ef2c4b3eec533b9b0cd2

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