Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca5282b6e25fbdc…

MALICIOUS

PDF

58.7 KB Created: 2020-12-05 05:20:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bc4ef8c972a11d7213d742a899e0bc9 SHA-1: 72c92659d8c54c0c7db99b92b112227973eb2d5c SHA-256: 3ca5282b6e25fbdc7853ff85356213aa8e5eab057e8bc1b04bdc527944c854ba
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain ('traffset.ru') that is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/strik?utm_term=solving+for+y+worksheet+algebra+1
    • https://bukolugupizokaw.weebly.com/uploads/1/3/4/8/134862081/vikofowozidedaroniga.pdf
    • https://xewaxamuroz.weebly.com/uploads/1/3/4/5/134529724/kizufavaremetudaxura.pdf
    • https://vimadefivikimaw.weebly.com/uploads/1/3/4/2/134265378/bc381e53477.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xupimaral/willow_canyon_logo.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd03d172f8b574a0f4559e/1606222801476/craftsman_3_ton_floor_jack_parts.pdf
    • https://s3.amazonaws.com/wavunot/bravely_default_vampire_boss.pdf
    • https://s3.amazonaws.com/rebomedug/farosipetugosakibamuwow.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4bd6f3de5e49b55a7f0b/1606372312881/pb_fit_powder.pdf
    • https://s3.amazonaws.com/roxawo/factual_report_example_simple.pdf
    • https://static1.squarespace.com/static/5fc592c8239b07229150fbb5/t/5fc850398eecd53e39e66b67/1606963257585/bemanager_be_a_soccer_manager_mod_apk.pdf
    • https://s3.amazonaws.com/rivazixexuguri/bailamos_english_song.pdf
    • https://static1.squarespace.com/static/5fc69c572cf09257bd930dfc/t/5fc7b0249dfc2a404528c072/1606922279246/run_and_shoot_offense_madden_20.pdf
    • https://static1.squarespace.com/static/5fc0c6a4a87939686407af5f/t/5fc0e87518e72e5fdbf890e3/1606477942803/wokasebezexin.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_off0000ad51.bin
aa31921cbdb55d7121c613074be50eea5ecd838b1fc12366e637f6776822dbc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD51 5640 bytes
font_01_sfnt_off0000c0a8.bin
16ccb4ec8726de78a82c487aed2d0ca382e236ba110948a0c1bfea55379c6d83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A8 8648 bytes

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