Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ed1ecf8b0947c9…

MALICIOUS

PDF

104.1 KB Created: 2021-09-12 08:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d755b09a6c77ee9a106e5e17088d4848 SHA-1: d46ad543a79e25bc07a0cc14661311f0b86f7c0d SHA-256: 80ed1ecf8b0947c9f4600fe04836240d1e40c4699665526993f28c2b53e0dd45
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document contains numerous links pointing to disposable hosting domains, a common tactic for phishing and malware distribution. While no scripts were explicitly extracted, the nature of the PDF and its link farm suggest it is intended to lure users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://avtokapriz42.ru/userfiles/file/51137750197.pdf In PDF document text
    • http://zoop-tech.com/ckfinder/userfiles/files/gelima.pdfIn PDF document text
    • https://nistd.in/userfiles/file/vofeveleta.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/68220145718.pdfIn PDF document text
    • http://charivne.info/images/file/93382843733.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/28969682017.pdfIn PDF document text
    • https://vjlabor.pitscovn.com/uploads/Upload/files/visis.pdfIn PDF document text
    • http://grandfiltr.com/files/file/sutejebafumegurizusudud.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/bikufidadines.pdfIn PDF document text
    • http://sparkpro.lv/content/file/51384028154.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8967cf2ce---51996245947.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1631296190_b9566290bb.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/piwafur.pdfIn PDF document text
    • http://studiotecnicoligioni.com/userfiles/files/37357362898.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/lojukakikavevoxorip.pdfIn PDF document text
    • http://synergytaekwondo.com/click2buy_newp/userfiles/file/vimire.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/kigevusixoxorazarobozal.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/96176598319.pdfIn PDF document text
    • http://pi-consulting.ch/download/mosarobif.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/78544233052.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/79157226974.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139d0f4d9bca---jikomibujagurafukala.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9816749115.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=the+late+late+show+with+james+corden+full+episodes+online+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_off00012cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAD 19440 bytes
SHA-256: aa10865e2d214b44f81d46bab03d12fa6251f00c958bba84315dcec29c847499
font_01_sfnt_off0001605a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1605A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17871 11164 bytes
SHA-256: d7015167b69766554e446b7c9901c9a4d08430d3f71c73c893c427490c747e16

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