Malicious PDF — malware analysis report

Static analysis result for SHA-256 60258c659fff4747…

MALICIOUS

PDF

97.8 KB Created: 2021-03-16 06:09:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: abbdade597d4b431951f285fbcc9b1af SHA-1: aec20b2badc2bc2e4d1ede7cd7307825956e5544 SHA-256: 60258c659fff47479ce0f594d73e2a98fc7d362c678541322de7c3d821f0a084
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs and the heuristic findings of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM confirm the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/strik?utm_term=the+silence+of+the+lambs+book+sparknotes PDF link annotation
    • https://jajamavufivaz.weebly.com/uploads/1/3/4/2/134235884/vunopilutokurajajuk.pdfIn PDF document text
    • http://sweetygirl.club/whirlpool_dishwasher_quiet_partner_1_wont_turn_oncfg37.pdfIn PDF document text
    • http://damvglaz0.xyz/toboropodixitr6yb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403808/normal_603caf289b0f6.pdfIn PDF document text
    • http://ita-bio.fun/8197796088736eda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445558/normal_60001373c55f4.pdfIn PDF document text
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/mafagasujikunug.pdfIn PDF document text
    • http://medway24.com/78399448727gt61e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_60109fbe17406.pdfIn PDF document text
    • https://vixagukire.weebly.com/uploads/1/3/4/3/134364056/sufuwomotil_ravaxolijewo_fozeb.pdfIn PDF document text
    • https://ronaleju.weebly.com/uploads/1/3/1/4/131482819/dakenafaf-petozepab-savakukoz-kuwovasisiwam.pdfIn PDF document text
    • http://usacreditscore.info/marketing_manager_high_school_requirementshunaz.pdfIn PDF document text
    • https://dolevepi.weebly.com/uploads/1/3/4/5/134587457/pulawefosisurake.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416671/normal_5ff4f15800c47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a96040c-be1a-4ca6-b61c-c09b5cc19fd4/gesofavoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29ecc19c-010d-4938-9d65-c1acd08b0310/21369592042.pdfIn PDF document text
    • http://xekubot.epizy.com/wureletenen.pdfIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_eb4506f98ca1440f8f3ecbf6fd533fe6.pdf?index=trueIn PDF document text
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_f49f995c95b84902a1134244fc60ac7b.pdf?index=trueIn PDF document text
    • http://jofawapedoguw.rf.gd/avengers_ppsspp_game_free.pdfIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_0b765fb24ee34df086a847fc7e46c504.pdf?index=trueIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_e3371b16c08d4f3f821a83951f345c04.pdf?index=trueIn PDF document text
    • http://kosugib.epizy.com/doxetakisinaxufuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd2a1478-95c4-47eb-8968-57515e7ab0d3/world_war_z_movie_free_download.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_off000140ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140EA 5408 bytes
SHA-256: c61a7812604a1e09131e69753edd9f72c021f7b76c3d2e67e6ff7a1ca620b401
font_01_sfnt_off00015326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15326 11288 bytes
SHA-256: 432f5c6907c0902b4a619d675935ac6fddd66fbcb1c8174df23f69251c70d173