Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f4c75fcd20c1c7…

MALICIOUS

PDF

116.8 KB Created: 2021-05-24 02:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f26b3480aa5378ea1c7839a017c4a2f8 SHA-1: e9e76f6317e9aabecef5369c15564c720e0a5f1e SHA-256: 12f4c75fcd20c1c74ed3b0bc3736f2fa56bf6ba9f51cfe70db1c36ef5ccad608
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting and employing UTM parameters, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirm the document's purpose is to redirect users to potentially malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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://jumiwimov.ru/strik?utm_term=ib+physics+hl+ia+grade+boundaries PDF link annotation
    • https://gipoxafevipetim.weebly.com/uploads/1/3/1/3/131398102/360710.pdfIn PDF document text
    • https://dosabaret.weebly.com/uploads/1/3/4/8/134861273/setodow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461516/normal_5fd3142141da6.pdfIn PDF document text
    • https://zefowuji.weebly.com/uploads/1/3/4/0/134096403/68665.pdfIn PDF document text
    • https://suxomaloki.weebly.com/uploads/1/3/4/5/134598925/70221fc8a.pdfIn PDF document text
    • https://giximanuv.weebly.com/uploads/1/3/4/5/134526051/melojaduzavamila.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408993/normal_5fef4c6495b9b.pdfIn PDF document text
    • https://wakowugiluto.weebly.com/uploads/1/3/5/4/135401031/7011050.pdfIn PDF document text
    • https://bunadijora.weebly.com/uploads/1/3/4/4/134432215/7973030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447436/normal_604d380db4730.pdfIn PDF document text
    • https://sixojidolox.weebly.com/uploads/1/3/0/8/130814042/wadadolisubuma.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/19c750a1-6a45-4e11-8bd8-eac9cf26bb50/2004_ford_focus_zx3_roush_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/formule_de_calcul_amortissement_pret_immobilier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa4bb2f-b57d-453c-87ad-a812343399bd/temamadipudubuwip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b30e582-2d5b-4329-9965-66afc5ccad68/wolf_oven_repair_montreal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/202e22b6-ca03-4477-9420-1889f33ffe2b/9511237527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd1ea68-760a-4bf0-9200-93f7bb51c14d/6372634338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66efed29-b437-4919-8a4b-5962cf82251c/90469411019.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/wuvuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84404aaf-3433-4a20-8922-eb0f43e4392a/sapexuwifexanutuke.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_off0001907e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1907E 5512 bytes
SHA-256: 91a1fd88bdf7909278f30a8595d146f65d33dd2d8abd358401bc9f610bc746eb
font_01_sfnt_off0001a335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A335 10176 bytes
SHA-256: 3ad42bd67deeec6a0f2fa3d6bb01f28508e776cab5cbeb6f6bcebcfd0e99826d

Open this report in the interactive analyzer, or submit your own file for analysis.