Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a24833cf224f6b…

MALICIOUS

PDF

83.9 KB Created: 2021-03-30 23:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ab65a797e2a60569b825a51093dcace2 SHA-1: 1229b19da2c205b1292cbc16e812c8789c521b32 SHA-256: c0a24833cf224f6b2ab06adba46459b279dba8d4db956912202ef5c6e733ec18
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=plantronics+backbeat+pro+vs+bose+quietcomfort+35 PDF link annotation
    • http://dkmz3.club/what_are_the_different_types_of_research_paperscxexq.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/wuvakigisaxixiba.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/dbfcd0bdc7.pdfIn PDF document text
    • http://demask.space/razurebodewofibebijuxozis5y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424645/normal_5ff4e87f51c2d.pdfIn PDF document text
    • https://zatozidebowetam.weebly.com/uploads/1/3/1/3/131398213/liwiwurax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_60412ba73f333.pdfIn PDF document text
    • http://clobuss.ru/32103902028momlb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454982/normal_5fea1d8733a3a.pdfIn PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/44f46c30507.pdfIn PDF document text
    • http://nazhivy.net/free_zentangle_patterns03snp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416918/normal_6058f65c531f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_602ed4428544d.pdfIn PDF document text
    • https://katesagi.weebly.com/uploads/1/3/4/8/134864962/terokedanovalori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421466/normal_5fd5fde99fd41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410431/normal_6007a18d2aecf.pdfIn PDF document text
    • https://jevejokanidepit.weebly.com/uploads/1/3/0/9/130969277/5522767.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371010/normal_5ff2783b1a53c.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/mulegofa.pdfIn PDF document text
    • https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/3966821.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/vubamarixaxu.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://bujekotu.atwebpages.com/bazijumabotibojolas.pdfIn PDF document text
    • http://noratev.myartsonline.com/busanusafimutajokedo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2F 5720 bytes
SHA-256: 9b166fc36db0ac737431b821efd21c7808467aadd148c152d19d5a145cdf0871
font_01_sfnt_off00010d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D93 11216 bytes
SHA-256: f42488d412d8b5b1464fa1bc86be376d3d3d26f7359d01fc99bc062b01d49c57
font_02_sfnt_off000133a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333