Malicious PDF — malware analysis report

Static analysis result for SHA-256 e238a0d0d1d9f622…

MALICIOUS

PDF

73.2 KB Created: 2021-02-16 02:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: ab874e71e9a2b71c5f6299c7da52bf5d SHA-1: 42e8e721fcb93d715d1a21c938dbc9f242f5ebb1 SHA-256: e238a0d0d1d9f622784236083359459c3f6b1d55e329172622baf946f94028de
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely to manipulate search engine results or direct users to phishing sites. The presence of embedded URLs further supports this, with one notable URL being https://seumenha.ru/strik?utm_term=sony+rx100+ii+clean+hdmi+out.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=sony+rx100+ii+clean+hdmi+out PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406473/normal_5fe1a1678be2b.pdfIn PDF document text
    • https://cdn.sqhk.co/nawakema/jd0FDjh/na_remote_for_dune_hd_pro_4pda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503387/normal_60140365bc7f8.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/YifUWBK/dawepabunid.pdfIn PDF document text
    • https://ritiburup.weebly.com/uploads/1/3/0/8/130814353/65cdd138dedd3bf.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/AjfoENx/cadena_100_lista_2019_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/tonuviwa/bicjghb/waxijiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366388/normal_5fca03ab83322.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/gNpMihP/zagoregifemak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_6017260c99beb.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/Fgfvgdw/le_cirque_duck_shoot_pinot_noir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365583/normal_5ff7cdaec49d7.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/3B2gigd/89093706110.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491723/normal_5fe1b2fd6a71c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486772/normal_5fd7f6b0a6f79.pdfIn PDF document text
    • https://cdn.sqhk.co/temisexezoda/sFjdgi3/free_heart_images_clip_art.pdfIn PDF document text
    • https://xajerunufunofe.weebly.com/uploads/1/3/1/3/131378991/tekexukinojeja-finajokoxapiv-logotup.pdfIn PDF document text
    • https://cdn.sqhk.co/daluzowinasu/GMhdhh7/17854394784.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D7 5468 bytes
SHA-256: 7718dba82125478e1fdb8d71eea2af8dbcf2051b6c72ca7b15afffb06c4ff1ec
font_01_sfnt_off0000f353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF353 10772 bytes
SHA-256: 339d3983a1c246586ee96d110ca1702af2a2683932526f137059e6337494cd8f

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