Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07604c092936e3c…

MALICIOUS

PDF

74.2 KB Created: 2021-03-12 01:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bd339d8501e1432915fba1d0fba27411 SHA-1: f8aafe667ad391a5c6fde5908ccc888f40728da4 SHA-256: d07604c092936e3ce6737a50c0e7819282d823c5704a31cedcf25765c038165e
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or redirection to malicious sites. The document body, though heavily obfuscated, appears to be related to an 'autocad drawing to pdf converter free' lure, combined with urgency language and a download button, indicating a phishing or scam attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/award?keyword=autocad+drawing+to+pdf+converter+free PDF link annotation
    • https://cdn.sqhk.co/gesimefav/eShhtWK/alone_lyrics_alan_walker_karaoke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366336/normal_5ff507e50405f.pdfIn PDF document text
    • https://cdn.sqhk.co/vudebalox/iugdgjH/wovuvagamadavot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378383/normal_6026de2a1c818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474457/normal_6034df4fcc07d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_5fe6bb725c108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488317/normal_6042cf65b6482.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/eicjfHY/nexus_mod_manager_skyrim_se_steam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489251/normal_5fe4658e02953.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392457/normal_5ff5600e63bdc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417318/normal_5fef01628482d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459926/normal_603ed126abdfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478716/normal_60434dc62674d.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/IBUjbws/17082750924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413004/normal_600ca80b9b3a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379029/normal_5fe744f86a401.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379626/normal_5fe50a8996916.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/jfhBghi/79465427071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_601197b13fd9f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_40a7c962e2384716b340392580555884.pdf?index=trueIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_814627668c4e47e2b156beb94a473f24.pdf?index=trueIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_e2cf3414ed274d7385096a3fb2e1bc0a.pdf?index=trueIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_f3e07a9f03944640ae564115dd06610f.pdf?index=trueIn 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_off0000e554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE554 5252 bytes
SHA-256: f58b5c2ce781bedce164361c47895ba671ec08028189fda90894eb26b401ecaa
font_01_sfnt_off0000f760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF760 10424 bytes
SHA-256: 4e71b7ebdc266ce008d47da3ca1cbb054f071a5ab51ae90ed506b996113c58c7