Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c269771d346189…

MALICIOUS

PDF

89.7 KB Created: 2021-03-08 21:08:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: de081c85d2eb1c0fa1843dab8838f0a5 SHA-1: 8c5c7645b6e714aa0b2dfbf43fae71d34172050c SHA-256: 00c269771d346189ee704df6ee9546e5e5a9bc80b968e7a6895ddbc996c5e4dc
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and potentially malicious, with a high ML classifier score and ClamAV detection. It contains numerous external links, many pointing to disposable hosting, suggesting an attempt to manipulate search engine results or distribute further malware. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of phishing or SEO spam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/123?utm_term=current+transformer+testing+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424996/normal_602db3ef25785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_603450a75d9fa.pdfIn PDF document text
    • https://ditixalopu.weebly.com/uploads/1/3/1/4/131410538/1768019.pdfIn PDF document text
    • https://xivimuwujaka.weebly.com/uploads/1/3/4/4/134440816/ranijekakaj-nosujibukote-jorivigumi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486743/normal_5fdb76464e680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375541/normal_600a8f7913e0a.pdfIn PDF document text
    • https://fuwudasex.weebly.com/uploads/1/3/1/0/131071129/c6b3969da4bcc.pdfIn PDF document text
    • https://gosasolana.weebly.com/uploads/1/3/4/5/134523876/9079833.pdfIn PDF document text
    • https://kukonite.weebly.com/uploads/1/3/4/6/134611202/07e0ffd1408022b.pdfIn PDF document text
    • https://tiwabegi.weebly.com/uploads/1/3/0/8/130874513/dimidofadibi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lofoxos.epizy.com/kitikekevijasixumesafaxap.pdfIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_9d0f13de9bb446f0861f52fd1b6f0961.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tamovagag/29700986055.pdfIn PDF document text
    • http://pegewolonu.rf.gd/how_to_print_iron_on_vinyl.pdfIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_9dbf36ce7aeb4234971133a343ba3e42.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/rawesegufibenopukuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/camp_lemonnier_survival_guide_2017.pdfIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_37ad0624bde342339997401e9c875b02.pdf?index=trueIn PDF document text
    • http://pasibujaz.epizy.com/how_to_change_voice_on_jawbone_jambox.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/art_in_theory_the_west_in_the_world.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/feelings_and_emotions_esl.pdfIn PDF document text
    • http://galapor.rf.gd/36303087079.pdfIn PDF document text
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_679d4c4d9d4940998d2ba0fd7c49afe5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11634 5096 bytes
SHA-256: d6a75e2ca1f335837b0b292192aa3add187b10124686fe85c452e00f593860ed
font_01_sfnt_off00012777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12777 10472 bytes
SHA-256: ea51123812668f5c02587f649043c62bd36ad006d10c5100d099103ce47022f1
font_02_sfnt_off00014b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B44 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3