Malicious PDF — malware analysis report

Static analysis result for SHA-256 0666470b96e439eb…

MALICIOUS

PDF

91.5 KB Created: 2021-08-10 23:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 70e6487e2abed73c6b550661dc7b05c7 SHA-1: a8c3cda1311c1317ca4026b37fc7643b63fb51ba SHA-256: 0666470b96e439eb848b01a8a425b35d839c41e6124094146b409d08a2476677
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. The embedded URLs, such as 'https://ketchas.ru/uplcv?utm_term=autodesk+autocad+2017+keygen+free+download', suggest a lure for software cracks or pirated software, a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 https://ketchas.ru/uplcv?utm_term=autodesk+autocad+2017+keygen+free+download PDF link annotation
    • https://aiwatopup.com/ckfinder/userfiles/files/lepewipotemuluv.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/55d36fce3f6cff9c02a4d0630e36d155/mipekojibigit.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/65109907195.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/dolebazimibori.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3e52d3a45---44741149494.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c942502df0a---gurubuzo.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/35241574997.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4e08c3a1ee2ce8361752ca13620460d7/42415024526.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/754b2d7071d1ce6ceaa4eef8393616bf/mojekimegewijakij.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/gubabutilepokamovawem.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/60e04f07f39c1be802ca8aaf3dca9526/gugozeluvoke.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/jizovotilipuka.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/0f75b811ca8d54583311f068f8d70461/17014597781.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/rbpu0o51tlpot1i7g5tbedlqaa/53251506771.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/q9ikehrif1vnqd245nnm14j811/kikalutavedidom.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/d1e0fa92a04e41f4e7913e2dd5142a2c/65145790362.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/1775445770.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/fd4320ee6bb314ad48f072c3f8c6e6a4/15807258947.pdfIn PDF document text
    • http://cserepakcio.hu/xdata/file/62853133972.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078337e1fcc2---46240589345.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/63614391816.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb89b28dbf0---37944492930.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723fdcda81e---67610627285.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/77625665084.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_off0000fd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001155e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155E 17972 bytes
SHA-256: d9f4a4c4abee13ed7ded656c7730940bc8ddb7d7ccf7a3be94245c329c658220
font_02_sfnt_off000144ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144CE 11276 bytes
SHA-256: 44012465f4c06274e7729ac5b8b5bb6f4f10de94ead0b687a80c55423cd2007d

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