Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c8961d1ed3addc…

MALICIOUS

PDF

72.1 KB Created: 2021-03-30 14:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bce0bbac7f725377f86d0b0e72af08ce SHA-1: b8c9d56424bd29811c011d021aa9afa64e854cb6 SHA-256: 69c8961d1ed3addce5d73927559c93df9e578247d2b9c4b3502cf494cbb1bc5b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed to deceive users. The primary URL, 'https://seumenha.ru/strik?utm_term=nonton+film+after+met+you+facebook', suggests a lure related to movie streaming. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://seumenha.ru/strik?utm_term=nonton+film+after+met+you+facebook
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/rozodinepejomag-tasije-nojumunuxu-gisekukef.pdf
    • http://zatoxuvisovapuf.sportsontheweb.net/asia_political_map_blank.pdf
    • http://wovuwukotuvoxi.mygamesonline.org/64688777816.pdf
    • http://qwert-ita.fun/custom_performance_exhaust_shops_near_me24ztd.pdf
    • http://kexedeziferu.sportsontheweb.net/ziruwafasekunuwope.pdf
    • http://kevakigev.medianewsonline.com/how_to_change_belt_on_honda_self_propelled_lawn_mower.pdf
    • http://startbastar.online/hp_probook_6550b_battery_part_numberytq3p.pdf
    • http://silvanozito.online/vb.net_tutorial_video_free_downloadnci6b.pdf
    • https://vabadagijuruka.weebly.com/uploads/1/3/1/8/131856539/vijigupup.pdf
    • https://dewokipapofoz.weebly.com/uploads/1/3/2/7/132741709/7682013.pdf
    • https://takogazaka.weebly.com/uploads/1/3/4/0/134017011/wunitir.pdf
    • https://nuvusutapisi.weebly.com/uploads/1/3/4/4/134460305/ziwaju-gelomusomarilab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_a87c92072d984106b6d9322a68755b7f.pdf?index=true
    • http://nizamazibenu.rf.gd/game_theory_meaning.pdf
    • http://muzafevabuma.rf.gd/17486659636.pdf
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_b81d743097a3409cbf4bfc9e72bffa06.pdf?index=true
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_0fb0171a2e734847b465a2824fc84069.pdf?index=true
    • http://kagijido.myartsonline.com/memolebuj.pdf
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_71ad9cb648d44929b7b229bde94a99fa.pdf?index=true
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_4ecc424602814232bdc96c5cfbc0657f.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df28.bin
e8986601928ae6acc50d89d96249e696f62d89fb2d000a32e6d242c5944c1836		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF28 5124 bytes
font_01_sfnt_off0000f091.bin
8a78f7f05f9f38f9e9cca87babf65ff3facc43e745a0477aa2c4d6e0a3e255c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF091 10296 bytes

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