Malicious PDF — malware analysis report

Static analysis result for SHA-256 5467dbade06374fc…

MALICIOUS

PDF

80.4 KB Created: 2021-09-03 04:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d80645d1937b4aeb33019da19bfbbd49 SHA-1: e42cc327c4a9ca2071444e2be4c4eb083a24f6e6 SHA-256: 5467dbade06374fc56c6d638b028df872f7b7db81814b395d2ac0ff52a7d8395
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of links, many pointing to compromised WordPress sites and disposable hosting, indicating it functions as a link farm. ClamAV and ML classifiers identified this PDF as malicious, likely a phishing or trojan delivery mechanism. The embedded URLs suggest an attempt to redirect users to malicious content, potentially for credential harvesting or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • 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 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 http://songiadahoaian.com/upload/ck/files/85542436788.pdf In PDF document text
    • http://sieuthibds.net/images/files/47217540640.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161314f1e96770---panikatoxidavobafutiretok.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/fowimoleme.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/2507956080.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4d258255f---90158005994.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/rju90616uaptqig057sgipn6r5/61777763984.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/bitedikazenadupisotid.pdfIn PDF document text
    • http://septumdent.com/img/userfiles/files/janiruw.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/2sgn6qqa66t1asq8g6cffj7mth/punowasagaxeli.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/245841fe443271dded40c3ad0fdf4212/3109047329.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071540ebb6d7---serugasirugapevu.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/xiwepireb.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/lixijapul.pdfIn PDF document text
    • http://minipit.com/data/files/sopufexepiluniwurufowuti.pdfIn PDF document text
    • https://alternativecarrepair.nl/userfiles/file/72142870701.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/gawasi.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160838900cc286---34030528407.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/lagelimatinaruxarututaxub.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/fbgj5eq6bd60lqesu5arqg7vk6/jivubipeses.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609896da9d055---pidefowajos.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/25811407338.pdfIn PDF document text
    • http://op-gold.com/ck_image//files/42176801999.pdfIn PDF document text
    • http://pinxedien.net/upload/files/64565572782.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16096461f0d075---54144714741.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/9165a434bf8534dc05d0103dc2da9882/ruxel.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/jufulojebafo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=convert+ms+word+to+pdf+for+freePDF 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_off0000d4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBB 10540 bytes
SHA-256: 72e835765ba697a8b4fdccc26069a7576b47262a065142190d228b4b622b182b
font_02_sfnt_off000104d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D9 18196 bytes
SHA-256: cfc1b3fa7958606b321486b2ed16b6bee0a823e080af326a41251bef9031d466

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