Malicious PDF — malware analysis report

Static analysis result for SHA-256 1129ef4e7d3c996c…

MALICIOUS

PDF

61.2 KB Created: 2020-12-05 10:53:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 24f8244d72a70edd893fc3f230e66c78 SHA-1: 36e81dd5766c651ee050e642589bd4f62cda881c SHA-256: 1129ef4e7d3c996cf1213328e546362f7c4e6c6f9a119fba66903d7cfd291947
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm, suggesting it's designed to redirect users to multiple external sites. The embedded URL 'https://traffnew.ru/aws?utm_term=usa+today+crossword+answers+july+19+2019' appears to be a lure, likely intended to trick users into clicking through. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/aws?utm_term=usa+today+crossword+answers+july+19+2019 PDF link annotation
    • https://fatatovol.weebly.com/uploads/1/3/4/7/134707957/mebukizupalezi.pdfIn PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/ravomenesitev.pdfIn PDF document text
    • https://mimasalidapu.weebly.com/uploads/1/3/4/4/134466186/4524174.pdfIn PDF document text
    • https://biwurozijusuxux.weebly.com/uploads/1/3/4/7/134724143/5938c0850172cc2.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/mafavuzenoliki/9442599354.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfe895e5c7695ca99606f9/t/5fc468113c6ccf69f3ec3be3/1606707217550/paper_doll_lyrics_louis_xiv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cbc7c6d964583621a279/t/5fc26f304e98326c025f522d/1606577968670/95159160286.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/jizozukopanimuxipawe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2814ec89e1c4b8fc8ad60/t/5fcada5fa3bc3d1915222a14/1607129695069/zavavirelodedir.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/curfewed_night_basharat_peer.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/bonus_act_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/illinois_work_permit_application.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/bepopaze.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_off0000b1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A2 5676 bytes
SHA-256: 67d4b445d1b0c9219844ec72a86a052fa0f7c066500b08a5372392a1df5eff4d
font_01_sfnt_off0000c51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC51E 10272 bytes
SHA-256: 4e8e84dc61619571c9b6f9d8572dc3dc5f9d92bb242ca3c34ff2114138c300a3

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