Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c3f9101992f1294…

MALICIOUS

PDF

76.6 KB Created: 2021-02-28 03:59:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eedde44bd521116b1043b6340bbd652f SHA-1: 51db1eef58f35684beef677c6db5b427e537709c SHA-256: 0c3f9101992f12946211a3967a45443b4606308750e3a4dc9bf2487de428feb5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this, indicating the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/123?utm_term=the+secret+river+quotes+racism PDF link annotation
    • https://nedalejurozawo.weebly.com/uploads/1/3/0/7/130776692/1167504.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/6030037294.pdfIn PDF document text
    • https://cdn.sqhk.co/leruwexikud/L6yXieN/dibivejagizezireregoj.pdfIn PDF document text
    • https://cdn.sqhk.co/napefabet/gMifhdy/hamilton_musical_the_room_where_it_happens_lyrics.pdfIn PDF document text
    • https://zodurulamenuvud.weebly.com/uploads/1/3/5/9/135956643/1bf94b9dd2e24a2.pdfIn PDF document text
    • http://wukosemat.22web.org/guitar_pickguard_material_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/oBifbii/sosokorurutezefivetawisos.pdfIn PDF document text
    • https://sobolone.weebly.com/uploads/1/3/0/7/130775045/xalofefilaw.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxafopagad/ehdJiaZ/47853982604.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/71426986758.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/gihbcic/drastic_ds_emulator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/xebune.pdfIn PDF document text
    • https://xoburevedevubuv.weebly.com/uploads/1/3/1/3/131380480/31bc7.pdfIn PDF document text
    • https://cdn.sqhk.co/jisokemefaz/nRjESic/wezanejopokozilir.pdfIn PDF document text
    • https://ludojuvixodezo.weebly.com/uploads/1/3/1/8/131856813/sejusuwuronu_wakosi_kometidibu_gopimot.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/jfYPOjj/fitir.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/djagihd/54220887463.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/jodabekuxobujusen.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/vpslijA/45862017933.pdfIn PDF document text
    • http://zonamumajotodot.iblogger.org/50596569897.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gizogebinide.rf.gd/duserokizuraba.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CB 4920 bytes
SHA-256: 77b74b498e571a90c223f8161b241697b2c91bf428fd010af737908f9baa96d3
font_01_sfnt_off0000f591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF591 9780 bytes
SHA-256: a1a3e604d16883d6ec63f0ab3c11ffaf65485f4cf0e6500d91dfff1eb05450cd
font_02_sfnt_off00011705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11705 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3