Malicious PDF — malware analysis report

Static analysis result for SHA-256 de32e1512f3a99e7…

MALICIOUS

PDF

84.3 KB Created: 2021-07-16 07:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4233054280ccfbe1371884c69d78bd9b SHA-1: 6170e96884797efd33f6c1319ccbe6f03ebcf881 SHA-256: de32e1512f3a99e726eec15ce8cfa8a899ce826f83b7b07ead441496202a7de4
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites, suggesting it's part of a phishing or malware distribution campaign. The presence of a visual download button further supports the lure to download a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cff576ed112---57256620218.pdf In PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609636678053a---7072140673.pdfIn PDF document text
    • http://anjilh.com/uploadfile/file///2021043021184084.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/kerenifu.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/xomoxaxama.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/21793501409.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/7ogb6tuagtql4ro26i1i2ptmvb/vetufurijidakuroz.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/bikelozevara.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/gtt13hv8khaquqjh0fgoho1dj6/wibipazojedusifapukuti.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7e73aec5c---fanasakupape.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b7488774794833418df6ece4e856487f/kadorasufu.pdfIn PDF document text
    • http://garderoba.sk/images/_file/futelil.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aff8abb7bc3---rapivoka.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160850a4ae4368---38214857704.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae148342ae---33058093910.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/fe041af592fd7b835714f420a1cea06d/tefoxemakivopememamijef.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/0ca6a341b6c5f77a7bbc98ab1ab2ffaa/milafoso.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b50be2747---lefifis.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/ginijuwuwupivoru.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160754393c44f5---38077297471.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/a95790fa156269684f113837fdad2c43/fofaluvojik.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/26d9741e6d214d9dfce32ede869b47c5/28793012747.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/19486410756.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=fundations+scope+and+sequencePDF link annotation
    • 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_off0000e587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE587 17276 bytes
SHA-256: 026f48d47c08a644110d3528d33703737c705c3e2ac590bed9eab355a1b43cc8
font_01_sfnt_off00011278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11278 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8F 10584 bytes
SHA-256: 95ead8127de3a01190a2dfa3aa51552a994161c3ee84a0d63842bcad46c9ff31

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