Malicious PDF — malware analysis report

Static analysis result for SHA-256 9081183486e3fef6…

MALICIOUS

PDF

84.5 KB Created: 2021-03-15 18:03:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d34a74aacf4a3fe31374eb4888b5447b SHA-1: d9a775ad364545ac06aca31519aa0d2ea15f6340 SHA-256: 9081183486e3fef6590b77bfa82593126a0ea264ccc32f01c3963d93122090e1
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains a significant number of external links, many pointing to potentially malicious domains, suggesting a link farm or SEO poisoning attack. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to redirect users to external sites, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=root+at%2526t+samsung+galaxy+s5+active+sm+g870a
    • https://cdn.sqhk.co/daxerarugak/hjdc2hf/471137877.pdf
    • https://kalabuzamebuku.weebly.com/uploads/1/3/4/3/134339718/7cb50fc3fd010.pdf
    • http://kefudepoduwudi.sportsontheweb.net/yamaha_arius_ydp_143_manual.pdf
    • https://cdn.sqhk.co/lajagika/hjaTia9/ben_10_alien_fight_game.pdf
    • https://fojakejozu.weebly.com/uploads/1/3/2/7/132712415/9cd532f6ce2b.pdf
    • https://cdn.sqhk.co/lojumisebu/LSiizxt/nedapapavajananaderawu.pdf
    • https://cdn-cms.f-static.net/uploads/4529281/normal_6018338745775.pdf
    • http://boforotaje.mywebcommunity.org/reliance_of_the_traveller_online.pdf
    • http://xatovapotogu.mywebcommunity.org/fatinafudi.pdf
    • https://cdn-cms.f-static.net/uploads/4459791/normal_602c4f29896b4.pdf
    • https://volifinidolil.weebly.com/uploads/1/3/0/8/130873876/3d83dc22e72.pdf
    • https://cdn.sqhk.co/dasekizob/icASGB8/41855964821.pdf
    • https://static.s123-cdn-static.com/uploads/4382643/normal_5ffb5ceaa3cc1.pdf
    • http://lebedugipul.mywebcommunity.org/solofubuludobudaxa.pdf
    • https://lozofuxoxezutuw.weebly.com/uploads/1/3/5/3/135303337/071c7566.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/23a0fd17-aad7-40fd-a3fa-cf5d911640e0/chicken_soup_for_the_couples_soul_quotes.pdf
    • https://uploads.strikinglycdn.com/files/877aac9e-7669-4637-8f72-9495b9e030f7/2008_jeep_wrangler_unlimited_x_problems.pdf
    • https://uploads.strikinglycdn.com/files/dc0e4107-0960-4f01-abb1-439f03b53ef4/xugukabog.pdf
    • https://uploads.strikinglycdn.com/files/824d6a85-65fe-4b75-9533-21a7b7726fd4/how_to_find_the_latitude_and_longitude_on_a_paper_map.pdf
    • https://uploads.strikinglycdn.com/files/92bc8d6f-83ac-4576-84e4-494986572e2a/87981748107.pdf
    • https://uploads.strikinglycdn.com/files/5a3a685b-5c2e-413a-aa52-a093b0e83244/42630057892.pdf
    • https://uploads.strikinglycdn.com/files/ae1319d1-2b12-4501-818b-5b146394e712/magimifosatawakobamixiger.pdf
    • https://uploads.strikinglycdn.com/files/9d4b66f3-6444-4b11-9968-675de7133d34/end_of_the_world_song_lyrics_day_by_dave.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001011d.bin
1b031fc593255062f5a5369a78c1dd8eef221528c36343a8e270f0782d56909b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 3896 bytes
font_01_sfnt_off00010e3d.bin
2babeb1a88aa27723e0f4a4f378a5e052c3d42046ad85526591b86a8c4805478		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3D 11684 bytes
font_02_sfnt_off00013573.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13573 4324 bytes

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