Malicious PDF — malware analysis report

Static analysis result for SHA-256 b287659960c78317…

MALICIOUS

PDF

125.9 KB Created: 2021-05-18 11:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c669e239929683d9a4202b9983ad2ad0 SHA-1: df7459d3f773a2a70e050d8d35a5e35b3ac3ef95 SHA-256: b287659960c783178c82d1d63d065479d6f5fcdea97ac9806a7f10e9bc75bff4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9932

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://dafemum.ru/strik?utm_term=bible+study+plan+for+beginners PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417519/normal_6039a304980ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383925/normal_600c21e4bac45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487409/normal_5fdb8b2f0e98c.pdfIn PDF document text
    • http://ninefukesat.iblogger.org/kjv_apocrypha_concordance.pdfIn PDF document text
    • https://foxetevuleludo.weebly.com/uploads/1/3/4/8/134859937/666ea2c694e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485930/normal_5fe78fa722d19.pdfIn PDF document text
    • https://nujelojebalu.weebly.com/uploads/1/3/4/6/134690198/00c095b4bcf3303.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/9839262.pdfIn PDF document text
    • https://vowimusu.weebly.com/uploads/1/3/4/6/134655535/pevumefim_rudulepudaran_besomir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390324/normal_600663ed03564.pdfIn PDF document text
    • https://naviguxiva.weebly.com/uploads/1/3/4/2/134266723/43484.pdfIn PDF document text
    • http://dugipoxumiku.iblogger.org/2196813843.pdfIn PDF document text
    • https://dowosebiz.weebly.com/uploads/1/3/1/8/131871919/kejixowu.pdfIn PDF document text
    • https://sanivuledaxefe.weebly.com/uploads/1/3/4/2/134234591/fb3ae5.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
    • https://s3.amazonaws.com/pekatikisuruki/betusile_nyange_lemihla_video.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/voice_changer_app_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/51338108461.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/inevitable_desastre_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/resume_template_for_freshers_with_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/jozizerog.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/menedapenojisuwekibav.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/parametric_equalizer_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/wiguzogozojod.pdfIn PDF document text
    • http://kabofed.rf.gd/chain_rule_problems_in_aptitude.pdfIn PDF document text
    • http://kadanokadija.epizy.com/ctet_question_paper_1.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/82237207026.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0B8 5380 bytes
SHA-256: 844af54decd1c844e5b23d4f493376973fa85410e81d81075c20e36680df3e4e
font_01_sfnt_off0001b310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B310 11764 bytes
SHA-256: 4121ee18b62b0adb2a216a16a22611f4ae4aa7974a358a9a742e163198227dc0
font_02_sfnt_off0001db0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB0F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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