Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ea21022ad8418e…

MALICIOUS

PDF

73.6 KB Created: 2021-02-26 21:54:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c7de9ff22bbc87418703f13289ea29de SHA-1: 9ccefcec62898f6506c344fda452543b3d2b929a SHA-256: 05ea21022ad8418e289c96c0c8358c8aee185da5999f5f28a96085e975ae0c34
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing sites, and ClamAV detection confirms it as a phishing trojan. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, suggesting an attempt to manipulate search results or direct users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior strongly suggest a malicious intent, likely related to phishing or malware distribution.

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://pelibifir.ru/strik?utm_term=sears+garage+door+parts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450242/normal_6020130a7a609.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/bojomaji.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/ggiegiP/gst_status_cancelled_suo-_moto.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/0ia1yha/ria_money_transfer_mobile_money.pdfIn PDF document text
    • https://maviwodoke.weebly.com/uploads/1/3/1/6/131606431/3458285.pdfIn PDF document text
    • https://jerexibim.weebly.com/uploads/1/3/4/6/134654770/3589513.pdfIn PDF document text
    • https://cdn.sqhk.co/jutirupot/jYicbsD/fovenunidumed.pdfIn PDF document text
    • https://sefovoridufu.weebly.com/uploads/1/3/1/4/131438839/11a55.pdfIn PDF document text
    • https://vafevovelawa.weebly.com/uploads/1/3/1/4/131407112/kalakolupute.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/kewuxejikiwe/video_er_link_app.pdfIn PDF document text
    • http://vivotes.rf.gd/gabuzuwufi.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/17046021085.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/gejuvuvubelot.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/healthy_vegetarian_diet_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/iko_linear_guide_malaysia.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_off0000e5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C2 5200 bytes
SHA-256: aa2be62622f9cf43d395f807a9df8fc3d67c0beb7fbdcb8123fce960eb3f7bdc
font_01_sfnt_off0000f77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77E 10188 bytes
SHA-256: 86f8a6d7d57b7d8c240d3211eeb36850f31297313553dac151b5e28ce9aeb50e

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