Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c5659efd77beea…

MALICIOUS

PDF

75.1 KB Created: 2021-02-18 18:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: af5fe8c2763dd491495e7fc41d1dc1ef SHA-1: 34d60656fb791d6037e7cc73a0651dcf41018adf SHA-256: 05c5659efd77beea866c32fd45e4b893d2f43f441ff13f503bb763641fffe791
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=the+darkest+minds+pdf+vk PDF link annotation
    • https://zanokelalugabu.weebly.com/uploads/1/3/5/3/135315143/f7ebabcb1e6fbc.pdfIn PDF document text
    • https://wudegilunukoga.weebly.com/uploads/1/3/1/3/131379548/b9020.pdfIn PDF document text
    • https://gitakitopawal.weebly.com/uploads/1/3/5/3/135325500/2daf61435a2b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415519/normal_600356c0efd9d.pdfIn PDF document text
    • https://namunoxup.weebly.com/uploads/1/3/5/3/135339392/1727568.pdfIn PDF document text
    • https://mibokedizigabu.weebly.com/uploads/1/3/1/4/131437832/ripozame.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448124/normal_5fcf40e555d3f.pdfIn PDF document text
    • http://lagujegivupani.22web.org/gonotapugenipepo.pdfIn PDF document text
    • https://zugixipenelir.weebly.com/uploads/1/3/4/5/134591811/mamatuji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4531523/normal_60052f25b325f.pdfIn PDF document text
    • https://xikematevi.weebly.com/uploads/1/3/4/3/134392378/6447689.pdfIn PDF document text
    • https://doxavigefixo.weebly.com/uploads/1/3/5/3/135391607/majilikid-wovogurujedamif-dudesexakomodux-bevikoga.pdfIn PDF document text
    • https://kafunonedejo.weebly.com/uploads/1/3/4/6/134662894/6ede39c88a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482848/normal_5febd1312c86b.pdfIn PDF document text
    • https://rikizanasurixa.weebly.com/uploads/1/3/1/3/131379420/7a8f772.pdfIn PDF document text
    • http://rasezinetoge.iblogger.org/colonoscopy_cpt_guidelines.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wixanarer/83544553832.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/91581161256.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/automated_guided_vehicle_agv_project.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/38383792817.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_off0000e760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE760 5324 bytes
SHA-256: 962733db3192b160cd4b9635940c8e3134c7a38cf94e90079afc7320f27b4633
font_01_sfnt_off0000f953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 11384 bytes
SHA-256: c66e368856861406605f130471b17385d013e822c14cb5ce7753f67c66bd49ae

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