Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc289f369bc2076e…

MALICIOUS

PDF

70.8 KB Created: 2021-06-02 16:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: adc4d1cf6efb1914e1f12d1fc30586f5 SHA-1: 1032bc85b58526465f15cb84e4f00db6b88068f9 SHA-256: fc289f369bc2076e377ac57130ac52148c39745d56779f92e703c5b4660e69f8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://synerhu.ru/pbw?utm_term=ios+13+download+link+for+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370275/normal_602d52172048f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465000/normal_5fe25f9424a98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409122/normal_6030d67b0b2f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_606cff70d00f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451737/normal_5ffe9c9e60b06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5fdc35072b2eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373239/normal_6001d378074f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_606ac0f98af4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385231/normal_5fe947f8b07c5.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4409000/normal_60b2f1f2f20f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501495/normal_5ffaa98f69b5e.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4379613/normal_60afed0ca5183.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4366987/normal_60b44d8d4a35e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fisukafetif.pbworks.com/f/bininexafiru.pdfIn PDF document text
    • http://nowefuro.pbworks.com/f/materi_manasik_umrah.pdfIn PDF document text
    • http://xujefix.pbworks.com/f/18252092078.pdfIn PDF document text
    • http://vedufid.pbworks.com/w/file/fetch/144510672/a_practical_english_grammar_exercises_1_answers.pdfIn PDF document text
    • http://gonumutat.pbworks.com/w/file/fetch/144510870/zokoxetimis.pdfIn PDF document text
    • http://zufumegi.pbworks.com/f/23467806279.pdfIn PDF document text
    • http://kefimazusob.pbworks.com/f/how_do_i_reset_my_pioneer_bluetooth_headphones.pdfIn PDF document text
    • http://vikowezanipe.pbworks.com/f/rimirawokefunenovefil.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/niwonazunubuvifuwemod.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD944 5212 bytes
SHA-256: 5a2112080e50aa2ac894b3244e3b040789af2c680eee2c3467f687fdf396bdb4
font_01_sfnt_off0000eb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB27 10192 bytes
SHA-256: c2ee992c33a0017b81c018bb466ab6d5cdc0eca56439b045b1daf891b655b1fa

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