Malicious PDF — malware analysis report

Static analysis result for SHA-256 918979074f590989…

MALICIOUS

PDF

72.9 KB Created: 2021-03-21 10:29:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67c5d32613b3442b1291c38902bbaa21 SHA-1: dd8bc3b3076ceaeca218b7f322f819553e428982 SHA-256: 918979074f590989be491d6c7f2eb9eae37f4bb30a4732390827d0c8d5490f7c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files hosted on file-sharing services, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wix?keyword=gallery+vault+pro+apkpure
    • https://gumomerad.weebly.com/uploads/1/3/1/8/131856086/pedemexijeneruka.pdf
    • https://japarikadag.weebly.com/uploads/1/3/4/1/134108792/9481137.pdf
    • http://dfds.in/mercruiser_4.3_carburetor_diagramtl57v.pdf
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/d19ed8f7e51.pdf
    • https://wipuzene.weebly.com/uploads/1/3/5/9/135971348/wikiwatibukif.pdf
    • https://nupafosudivoz.weebly.com/uploads/1/3/2/6/132682156/duvovutokuda.pdf
    • https://temerineg.weebly.com/uploads/1/3/0/9/130969052/f091b5ef44b.pdf
    • https://nukofagola.weebly.com/uploads/1/3/4/8/134883999/1839868.pdf
    • http://intereriia.com/why_isnt_my_sodastream_fizzinib3s.pdf
    • http://erkutungotu.com/64271006901zq5ti.pdf
    • https://dolujutizividev.weebly.com/uploads/1/3/4/8/134864897/9371683.pdf
    • https://rofipufexorijol.weebly.com/uploads/1/3/4/6/134656377/bulelojulugim.pdf
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/borovojisopeji-vuxexowe.pdf
    • https://rogebanapixiwo.weebly.com/uploads/1/3/5/3/135343373/3233140.pdf
    • https://bujozimadepaxed.weebly.com/uploads/1/3/4/6/134615651/gilojo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/moduxanakuri/sowubosu.pdf
    • https://s3.amazonaws.com/jeromisixinolib/87385522123.pdf
    • https://s3.amazonaws.com/seriposuj/ayyappan_malayalam_dj_songs.pdf
    • https://s3.amazonaws.com/muvazi/kareranepufob.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d669.bin
e77dc95e34fc9577b73b15c080bf51da59fa0203354a1128d4dbbd0ad882e8fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD669 4892 bytes
font_01_sfnt_off0000e72f.bin
b9d3dfdaf11840056ff6c8b00456064d429a995c0450d4ef47971cdc9b9b5ac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE72F 15408 bytes

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