Malicious PDF — malware analysis report

Static analysis result for SHA-256 674dbe29212f6315…

MALICIOUS

PDF

73.9 KB Created: 2021-06-03 04:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ba2bb36bae30009346d2175114f29c2 SHA-1: b7db140362230763cceff068420c834336a10ea5 SHA-256: 674dbe29212f6315ed590c573eb2d3a5f9359f857a77e5b8b8eac9617dc2573d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of embedded external links, suggesting a link farm or phishing attempt. The primary URL observed is https://garglob.ru/pbw?utm_term=how+to+clean+hepa+filter+on+shark+vacuum, which is likely part of a campaign to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://garglob.ru/pbw?utm_term=how+to+clean+hepa+filter+on+shark+vacuum
    • https://cdn-cms.f-static.net/uploads/4485434/normal_60415d7f2a5dc.pdf
    • https://cdn-cms.f-static.net/uploads/4384820/normal_601fba6fa9996.pdf
    • https://bosebekepomij.weebly.com/uploads/1/3/4/8/134870535/raxavaxopifuf-supikimojixok-nuvulozaximaso-nubepowek.pdf
    • https://cdn-cms.f-static.net/uploads/4372740/normal_601d6bc25de60.pdf
    • https://ruwuzeget.weebly.com/uploads/1/3/4/7/134755445/5107664.pdf
    • https://cdn-cms.f-static.net/uploads/4450870/normal_60289fc944f6e.pdf
    • https://static.s123-cdn-static.com/uploads/4420037/normal_5ff7d8846382c.pdf
    • https://jumazege.weebly.com/uploads/1/3/1/6/131606101/kubodiraburuxe-tageladu.pdf
    • https://cdn-cms.f-static.net/uploads/4379370/normal_603a24328ef0e.pdf
    • https://womijepadake.weebly.com/uploads/1/3/4/4/134476187/xezuruwudefu.pdf
    • https://cdn-cms.f-static.net/uploads/4421788/normal_6056024d38303.pdf
    • https://static.s123-cdn-static.com/uploads/4369638/normal_5fcc5422a9627.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lekipirunezi.pbworks.com/f/game_ultraman_fighting_evolution_3_ps2_iso.pdf
    • http://zegugas.pbworks.com/f/what_type_of_oil_does_a_toro_lawn_mower_take.pdf
    • http://faxamom.pbworks.com/f/darogunux.pdf
    • https://uploads.strikinglycdn.com/files/9591f3b7-be47-4404-bdb1-32e121e6361a/what_is_participatory_development_in_social_work.pdf
    • https://uploads.strikinglycdn.com/files/02bd15d3-278f-4466-9656-17b1e60257bc/blodgett_convection_oven_parts_manual.pdf
    • http://gepefupugalu.pbworks.com/f/uc_browser_handler_apk_free_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f5.bin
3ffdb0c6b6025a3b13ac209299d41623145380e4836b2602b8ca2a55304063f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F5 5432 bytes
font_01_sfnt_off0000f660.bin
f0c63135427d578a2378d87cb7353d2388718f624c3d592b909c15a0e5a1298b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF660 10528 bytes

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