Malicious PDF — malware analysis report

Static analysis result for SHA-256 e148856c1799911c…

MALICIOUS

PDF

88.9 KB Created: 2021-02-11 20:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a26914399076653eca4275bd3a487904 SHA-1: 2d67d00da69022f01a33a08b4314d7ee60112800 SHA-256: e148856c1799911c421a38013bdc7d2f31127a7fa6173ba411f4f8b4ec8719de
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

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://maypoin.ru/123?utm_term=how+do+you+make+a+viking+ship PDF link annotation
    • http://hangzhoumetal.ru/car_race_games_playx5iw1.pdfIn PDF document text
    • https://cdn.sqhk.co/kagalitisup/jiaibgj/offline_voice_assistant_for_android_download.pdfIn PDF document text
    • http://sijuvibitita.iblogger.org/32124410363.pdfIn PDF document text
    • http://idealicaitalia.website/wopuvegikepomaxo9u06x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379471/normal_5fefa57a2ed65.pdfIn PDF document text
    • http://nutristrike-shop.ru/adoption_papers_philippinesvxxj5.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/d4pN9aO/gepixaluguzesisos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385863/normal_6012e70eb323d.pdfIn PDF document text
    • http://blockhcain.host/phonegap_camera_example1cx0g.pdfIn PDF document text
    • http://normal-id.com/numiruloiotx6.pdfIn PDF document text
    • http://cccckkkkkdd.space/74504916638qi28i.pdfIn PDF document text
    • http://zzzmmmmejjj.space/dragon_ball_character_creatorumh43.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jeNyjfy/79058295370.pdfIn PDF document text
    • http://smcjd.com/62225839357aflax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423133/normal_5fd8c0726d507.pdfIn PDF document text
    • http://rekilafemet.iblogger.org/adobe_air_offline.pdfIn PDF document text
    • http://korecos.ru/cervical_rib_exerciseszlqlz.pdfIn PDF document text
    • http://peuer.xyz/the_hateful_eight_extended_version_parents_guideuurg6.pdfIn PDF document text
    • http://antonioita.fun/jerazucmf8x.pdfIn PDF document text
    • http://otomail.business/69638193039oxlst.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/ejjhiJ0/65639894178.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ladorum.epizy.com/whatsapp_video_love_sad.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_off00011a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3D 5524 bytes
SHA-256: f2d2b49cae8bc64787f58985e6593669314af80156d922ab08cc165ec676e899
font_01_sfnt_off00012cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFE 11652 bytes
SHA-256: c656a72fc0b3c3044387c53de139fa1bc35afc132e8677815519a6e1d10f6f40

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