Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d0fecadc4f0273…

MALICIOUS

PDF

81.9 KB Created: 2021-05-22 02:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 93bde63ba4f0fe7befb44d1f366ab316 SHA-1: eb1bf13a8fae6379542c9123149c1f23ead0fdcf SHA-256: c2d0fecadc4f027336652460b67562b97f1304101d73cb526c64c1fff5dbaeb8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to seemingly random PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://gimoguvi.ru/strik?utm_term=communicating+in+groups+applications+and+skills+pdf', is flagged as suspicious and likely leads to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://gimoguvi.ru/strik?utm_term=communicating+in+groups+applications+and+skills+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450145/normal_603b2d535b3fa.pdfIn PDF document text
    • https://jepejopik.weebly.com/uploads/1/3/4/6/134610321/komozunasamij-wikobiruzul-bikixoziwisuf-zisixelik.pdfIn PDF document text
    • https://rodedewosesuge.weebly.com/uploads/1/3/6/0/136010241/f146a.pdfIn PDF document text
    • https://vuveporejar.weebly.com/uploads/1/3/2/6/132695394/834360.pdfIn PDF document text
    • https://bobiputab.weebly.com/uploads/1/3/2/8/132814039/sunuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494165/normal_60563fddee2fb.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/jovekus/drupal_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/22_clues_level_32.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/types_of_lpp_method.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/nuwomusixapalivugaxomu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/fisher_price_rainforest_jumperoo_assembly_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/66696541772.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/xupinijofow.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/tazigiduwozo.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/fejomuzelewo.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/17893501441.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/binamebijajuwapumu.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/buccaneer_galera_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/nuvejodo.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/74193731789.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/matlab_axis_tick_label_format.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/lol_champions_guide_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/dokobogeved.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_off0001039d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039D 5444 bytes
SHA-256: 36f3dd7707b6f5978e0eefbf809a1ba879728362ca672c751188ca42bbb54f73
font_01_sfnt_off00011609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11609 10584 bytes
SHA-256: 441f93652e8a53f89123cf0921d5dc50290a7fd36b6d7668c1ebf357a29f315b

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