Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d214c034268d0d…

MALICIOUS

PDF

74.9 KB Created: 2021-03-24 15:36:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 423cccc7150003cbc31e9cf821bfda65 SHA-1: 93e7d4c4c84527adbd8b49930b0e6da780868f28 SHA-256: d9d214c034268d0d5190cb8f17f5b7e7c2b6f45ba42d40874c0f595f8bb1df4d
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 0.9996

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://pelibifir.ru/strik?utm_term=the+ultimate+gift+movie+worksheet+key PDF link annotation
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/tofolor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496404/normal_601988f834ab9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481695/normal_5fe2abfc3ef3c.pdfIn PDF document text
    • https://bosevexoliwi.weebly.com/uploads/1/3/4/5/134585498/8152988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476567/normal_6022212caf0e5.pdfIn PDF document text
    • https://pebepatesova.weebly.com/uploads/1/3/4/4/134447190/f2ed759bc4eceed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407084/normal_60010083bc115.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459921/normal_5ff5542c0fb6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486356/normal_5fdc6ada41ae0.pdfIn PDF document text
    • https://cdn.sqhk.co/joduragenep/hgjeyWi/lodazuteve.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/5298809.pdfIn PDF document text
    • https://kojivijagidisu.weebly.com/uploads/1/3/4/0/134042347/sosatewalazet-voriduxumi.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/DAAjegi/59904606908.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/fghjnux/bullet_for_my_valentine_albums_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380393/normal_6019371e96eae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zujisofivo.onlinewebshop.net/hornady_150_gr_300_blackout_load_data.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/1_centmetro_cbico_cuantos_mililitros_son.pdfIn PDF document text
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_83c21094a46f42f9b893726effff5568.pdf?index=trueIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_310e958964de4adeb6eb3886018ab9d5.pdf?index=trueIn PDF document text
    • http://fikelamizogu.myartsonline.com/cognitive_behavioral_therapy_for_ocd.pdfIn PDF document text
    • https://cb71deac-5427-4a11-aec2-6feec017c243.filesusr.com/ugd/4cd983_3651cf42dfd84580829ebbe12a95d658.pdf?index=trueIn 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_off0000e2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E2 5448 bytes
SHA-256: 424ffd6b546b9cc334882d7b928ce94d69b1cd480f072393f5d4af120188eb62
font_01_sfnt_off0000f55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55C 11456 bytes
SHA-256: a08005a1e0af79df7936702fcb56970966b2cc166fda87ff2973f5b363c61843

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