Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab2cdbbc1c18a54…

MALICIOUS

PDF

75.2 KB Created: 2021-04-05 01:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 46e82cffee32cf51ca32d695e23d55c2 SHA-1: 1437b357607ce8e76143783f8b7ad6711c5778e8 SHA-256: 8ab2cdbbc1c18a54cdeeb771030f794c49dea591138bf92f34ceb3fb7b82666d
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/123?utm_term=genie+z45+spec+sheet PDF link annotation
    • http://lazujifoxupa.getenjoyment.net/john_locke_vs_rousseau_social_contract.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402745/normal_6052ab857f7b9.pdfIn PDF document text
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/tilusekurat-danuxibanu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408993/normal_604d7f171250a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_6043ee245b457.pdfIn PDF document text
    • https://feditesar.weebly.com/uploads/1/3/1/4/131483001/fajawesanusamak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479678/normal_6060292fc52ba.pdfIn PDF document text
    • http://tejasatobes.medianewsonline.com/14552698873.pdfIn PDF document text
    • https://jakinazar.weebly.com/uploads/1/3/1/0/131070367/rosovanemujutojox.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/rockola_fireball_cd_jukebox_manual.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/113393523.pdfIn PDF document text
    • https://fuxiwajusefu.weebly.com/uploads/1/3/4/6/134617271/torebibe_lekexipafip_dotopoji_suzajonet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505839/normal_5fd7e8241e578.pdfIn PDF document text
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/bdf4477.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_7b997b7bbb394b889744e5018c62a8e1.pdf?index=trueIn PDF document text
    • https://3e206333-d6ff-4be5-a246-6289f7259d3b.filesusr.com/ugd/973a7d_8c3927f211f64dfaa179387f07b0c2b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aff0f887-09b7-454c-944e-7213e666ea28/how_do_i_charge_my_beats_studio_3_headphones.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/top_10_foods_to_eat_to_lose_weight_fast_way.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82386bb0-74d0-4613-a86b-879a7544adaa/vanilla_survival_minecraft_servers_bedrock.pdfIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_fc25445cb8d748299e5856ff5a6eb463.pdf?index=trueIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_759b0b5084924353907f3757db85e317.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff166e6-009a-4522-84f9-47b5ff8980dd/voxovupagav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb850e6-f09c-48d8-a21c-1922b842c937/can_fitbit_be_worn_in_shower.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/vizio_e550i-b2_stand_removal.pdfIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_c146dc4a20c641cca378ecee25f34cf1.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_off0000e912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE912 4976 bytes
SHA-256: e7b93b7161e31a59c637844c1a1587d3d893f06af903b2e477d929212da36846
font_01_sfnt_off0000fa1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1E 10936 bytes
SHA-256: dace9ea0659b01fb514b4fb27ebbc2c9615269d1d0e7dec16c07448ed64cabab