Malicious PDF — malware analysis report

Static analysis result for SHA-256 4209748f56f53aa1…

MALICIOUS

PDF

84.4 KB Created: 2021-03-07 12:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 45d10b805197de97e326a98914b3fe05 SHA-1: 29cbdf5a8ed9443b13bcf729ddb463f316a0966f SHA-256: 4209748f56f53aa12dbdab21d17033000f37cfdfb31ec151d711a46dda4a31ad
186 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 0.9998

Heuristics 6

  • 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.
  • 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://ponafet.ru/wix?keyword=spa+sensations+bi-fold+box+spring+queen PDF link annotation
    • http://static-start.top/590122488390bnrl.pdfIn PDF document text
    • http://chestlune.online/bisirotezapuforizawoz4vj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500665/normal_60373c7654c63.pdfIn PDF document text
    • https://cdn.sqhk.co/safovokon/Jshcujb/nitodizunolupo.pdfIn PDF document text
    • https://gefivepuli.weebly.com/uploads/1/3/4/6/134620723/6192433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447647/normal_6022db8938366.pdfIn PDF document text
    • https://godosofebi.weebly.com/uploads/1/3/4/6/134651625/1410404.pdfIn PDF document text
    • https://muwalivom.weebly.com/uploads/1/3/2/6/132695892/bejipa.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxokakijefe/g9hiwjj/tap_training_osu.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/f3aa6.pdfIn PDF document text
    • http://questotzvezd.space/lapse_ending_guideu5ent.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413469/normal_5fe95c685bbdd.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/mebeme.pdfIn PDF document text
    • https://bopunesarikimar.weebly.com/uploads/1/3/1/4/131453984/papemezivogab_tijutipiga_jekikobane.pdfIn PDF document text
    • https://cdn.sqhk.co/denobafopum/micigii/swot_meaning_in_simple_english.pdfIn PDF document text
    • https://datirelegewewat.weebly.com/uploads/1/3/4/3/134329883/mawokagujopu.pdfIn PDF document text
    • https://gopebuxagofu.weebly.com/uploads/1/3/2/6/132681698/kuvitumixilogak.pdfIn PDF document text
    • http://lordtrans.ru/can_you_share_a_copyrighted_photo_on_facebookf0e4g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421778/normal_5fcdc368d8d99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE6 5680 bytes
SHA-256: 3dfb88a2c00121db594ce3a6256e7ba2f7850bd56e94ba511ae55504c247267a
font_01_sfnt_off0001203f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203F 10720 bytes
SHA-256: f09c4f4ca44b7187be4382d1a13d59a81e517221b10a13091af4f4a93c7e9e02

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