Malicious PDF — malware analysis report

Static analysis result for SHA-256 07361de5b36c44dc…

MALICIOUS

PDF

66.4 KB Created: 2021-06-09 22:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ec395960e6d7ad4471bd0381e9b25d9c SHA-1: 27c9361176bd3b0acdf14c422da29fb7ce32ff8c SHA-256: 07361de5b36c44dc42ec31f20bf333b9fa85bc0284fe4d75ed6bd645eeeec028
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 0.9998

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://lozipotod.ru/123?utm_term=twitter+icon+hd PDF link annotation
    • https://dovabobu.weebly.com/uploads/1/3/5/9/135978637/db365a97.pdfIn PDF document text
    • https://jawonuvanez.weebly.com/uploads/1/3/6/0/136021807/bb7c35f9.pdfIn PDF document text
    • https://taboloralo.weebly.com/uploads/1/3/2/7/132741194/8209104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_60290be6eb414.pdfIn PDF document text
    • https://dotawipe.weebly.com/uploads/1/3/5/3/135323210/dazexesuvumufinuder.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483836/normal_600349ceda117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389603/normal_5fda85b504627.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4416514/normal_60b45f2909e0d.pdfIn PDF document text
    • https://puponefunojubuf.weebly.com/uploads/1/3/4/6/134670615/ferijimoden-vinabaguxo-nalotisoka-gigopu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411714/normal_5fff7c054a491.pdfIn PDF document text
    • https://konozobit.weebly.com/uploads/1/3/4/4/134456152/5535693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423133/normal_6059014bbca33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xutosop.pbworks.com/w/file/fetch/144679887/72324027837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb665d6a-5886-48ac-b3a7-0285e998d260/35442706886.pdfIn PDF document text
    • http://najapenoz.pbworks.com/w/file/fetch/144570111/japaxazijepen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d141e9-5062-41aa-b3d7-6e99c1dbc576/sugar_blues_lyrics_fats_waller.pdfIn PDF document text
    • http://wojipag.pbworks.com/f/tusewewikozedowa.pdfIn PDF document text
    • http://pefagisunel.pbworks.com/w/file/fetch/144524718/candy_crush_saga_mod_apk_unlimited_lives_and_boosters_and_gold.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37dd1d0-880f-496f-b15c-b029b17341ab/quiz_sobre_qual_faculdade_fazer.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_off0000cbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB9 4648 bytes
SHA-256: 7da8b5c31e5357da7744170eb102c0a630f868679c6454556dcb973bde5f1e38
font_01_sfnt_off0000db8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8D 9676 bytes
SHA-256: e4b1b2e1f6c44721b348467490e9c4195e880bba5729abbb19dda445c01de17e

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