Malicious PDF — malware analysis report

Static analysis result for SHA-256 a068feefd0a6e95e…

MALICIOUS

PDF

71.5 KB Created: 2020-12-06 09:39:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 073f77f7a1cf4d83271d35b41c47097c SHA-1: 1a9ae968c7c1831d9769a266ef721d8076946f0d SHA-256: a068feefd0a6e95e50d88eddf30dfa7127f0b324a31d3aec36e0dba406177859
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to suspicious Weebly domains, suggesting a link farm or redirection mechanism for malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/aws?utm_term=blu+ray+media+player+software+free
    • https://fikejibin.weebly.com/uploads/1/3/4/3/134331262/getafovope-jimidasokerofik.pdf
    • https://pobunusegem.weebly.com/uploads/1/3/4/4/134460984/3061871.pdf
    • https://malolikekex.weebly.com/uploads/1/3/4/7/134718462/tenaji.pdf
    • https://waniremupamed.weebly.com/uploads/1/3/1/4/131407535/1215919.pdf
    • https://tovoginimu.weebly.com/uploads/1/3/4/3/134379987/3708240.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vokeri/44539208531.pdf
    • https://s3.amazonaws.com/fulomufimikim/flowers_for_algernon_book_vs_movie.pdf
    • https://s3.amazonaws.com/vukumesoj/retutaluwonipomomifoku.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf73d3ca23154c95af66b/1606219582237/gitotaropajusesidogitezuz.pdf
    • https://static1.squarespace.com/static/5fc0d446ab79f442f2293e00/t/5fc41367bc819f1cf4582f45/1606685544863/dvdrip_latino_sonic.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdca.bin
9bc484370d7121c7f2b6ba84cddf855a112fae84ae15462e6c43b062f98a3b2d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCA 5208 bytes
font_01_sfnt_off0000df99.bin
0bff84284474205fd38d22ecc9f549d1c408d0ccbdee0179da15152d27290c34
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF99 10420 bytes
font_02_sfnt_off00010353.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10353 4324 bytes