Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf81346efd5730f…

MALICIOUS

PDF

82.3 KB Created: 2021-04-17 20:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b27e797c592a8215c4fb413b0fd09fe1 SHA-1: 52b855f41a95925239a4c428a54ec890a47ce92e SHA-256: caf81346efd5730f8699062a167a603ac8effb0bea4d3b6e43d4089ad599fb10
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 0.9993

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 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://zajinet.ru/strik?utm_term=petsafe+wireless+fence+with+two+collars PDF link annotation
    • https://kuzirorox.weebly.com/uploads/1/3/0/7/130775715/samiwinebu_vewumomokozubi_mavemit_giridune.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419211/normal_6015b869e366a.pdfIn PDF document text
    • http://winoorama.fun/the_book_of_thoth_originalyixqj.pdfIn PDF document text
    • http://zhk-rekord.info/tadenogapakixivinebapugubpez5i.pdfIn PDF document text
    • http://fresh-ita.fun/198515123504qs0b.pdfIn PDF document text
    • https://dudixojazimonam.weebly.com/uploads/1/3/4/6/134638097/9f15df85d.pdfIn PDF document text
    • http://reduslim-ufficiale.website/how_to_draw_a_dragon_step_by_step_easy_videoqiaw1.pdfIn PDF document text
    • https://xewikoleruwi.weebly.com/uploads/1/3/4/8/134897031/8230165.pdfIn PDF document text
    • http://epipog.com/folaxiwiz7795n.pdfIn PDF document text
    • http://arthromedshop.xyz/18772315417uj7lw.pdfIn PDF document text
    • http://rm-swis-mine.com/36129175070wqc86.pdfIn PDF document text
    • http://svoydvalend.xyz/fajinovopilaradetr73se.pdfIn PDF document text
    • http://douchehub.xyz/36237124746izhvv.pdfIn PDF document text
    • http://maturibcgj.space/zujimosezomegebotoxonafub1cuu.pdfIn PDF document text
    • http://reassurez-moi-fr.info/bupuwafikumumawu420j6.pdfIn PDF document text
    • https://binazinir.weebly.com/uploads/1/3/4/1/134108718/devob_dorufipumate.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375194/normal_5ff53cf166d0d.pdfIn PDF document text
    • http://blubadgehelp.net/jutebinuramiv5f6oi.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/vedamifapemidof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f671bd54-721d-4cfa-8f92-23044bc21975/41318024050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99904ca2-7c75-4032-b28b-bf20a5cc161d/the_neverending_story_2_stream_german.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6fed3f2-b6d0-4078-a22c-bf15b8a7da78/73625565668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14740b68-2625-4bbe-aa8b-4287170c19f3/55324438754.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10274 5064 bytes
SHA-256: 1583fe059ac82d4ce7df51f3e9c4c79129c174fe0f62eacba6a1a56e14effada
font_01_sfnt_off000113bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BD 11756 bytes
SHA-256: d6475e5ba58b6d9297ab901a90b77afae16bcfbbc8708b5fa9d703e910824848

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