Malicious PDF — malware analysis report

Static analysis result for SHA-256 587a2e6468f50a8e…

MALICIOUS

PDF

78.1 KB Created: 2020-12-27 16:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c6c6766cafa2ca39b09cfaf7c568f92a SHA-1: 85fc5d0d2c0c3184b2b790336f88a82aa838cd8f SHA-256: 587a2e6468f50a8e3aabbe4d59b4df7e6cb76856081581365fbe4b75597a9d94
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains an embedded URI pointing to a URL that appears to be a lure for downloading software. The PDF also contains a link farm with numerous external PDF links, suggesting an attempt to distribute or host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://traffnew.ru/strik?utm_term=super+fast+browser+download+for+pc PDF link annotation
    • https://visobugogo.weebly.com/uploads/1/3/4/5/134582963/d1685993c1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392649/normal_5fc9909d2c34e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413228/normal_5fbe891d4eb6b.pdfIn PDF document text
    • https://xizuxukavawot.weebly.com/uploads/1/3/4/3/134376570/eb4dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408002/normal_5fbf0625db9ab.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/jezowogabusot_dajuxax_peloxidinivolup_foxilabeleturak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e53fb3d-75fb-4c56-8e5d-ae256a8ddfe6/bubba_forrest_gump_costume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04094202-54b2-42ba-bd3b-b08d4df94e32/john_c._hart_memorial_library_shrub_oak_ny.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/honda_3000_generator_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d40131a-c979-460f-b5ea-32d87bf99520/46169801043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26c129b2-24f1-4694-a638-62cfe8122c37/fopanotivuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/spark_definitive_guide_free_download.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A7 5484 bytes
SHA-256: c65960a42ac431346e97107f5b6755f4593b450dd4ba802de5d497a9658c445a
font_01_sfnt_off0001086e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086E 10332 bytes
SHA-256: 7559b32517491a9e61eda52261e14ec9186819363f7d292d522a7137bc348980

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