Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4fb04adb7cfe2a…

MALICIOUS

PDF

75.9 KB Created: 2020-12-07 12:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08f1e2204a30124399c0d6c1b87b294b SHA-1: 1848a77666df45b683572fe06c76212a8632aec5 SHA-256: 9a4fb04adb7cfe2a34fb72b5f00f2be383520493edcc5b69c8e32247caed52ed
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing. One prominent link, 'https://traffset.ru/strik?utm_term=yuri+on+ice+doujinshi+omega', suggests a lure to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=yuri+on+ice+doujinshi+omega
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/foruxilawaxorer_pobopomupolevu_mitari_najeneli.pdf
    • https://fozunisomizu.weebly.com/uploads/1/3/4/6/134666093/zuxinosutubew_texelejijedema.pdf
    • https://tagufonatudivar.weebly.com/uploads/1/3/4/6/134609106/gudixasunifid.pdf
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/09b03b.pdf
    • https://tufobedix.weebly.com/uploads/1/3/4/4/134431979/vekep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dapekufoxiraku/seneca_junta_de_andalucia.pdf
    • https://uploads.strikinglycdn.com/files/1ef32cc6-fc31-4ed2-a566-c42bf725cbff/st_francis_raleigh_youtube.pdf
    • https://s3.amazonaws.com/panokojol/android_sound_audio_editor_apk.pdf
    • https://s3.amazonaws.com/zaxawetawupo/mosefikuziki.pdf
    • https://s3.amazonaws.com/xanebavifamopez/brief_history_of_india_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/b4386696-516d-432f-aea0-76eb4c1e09a7/43583426640.pdf
    • https://static1.squarespace.com/static/5fc27a90c14dfd36fefb8bc0/t/5fc4d3514e98326c02a8ec90/1606734674391/kinston_high_school_alabama.pdf
    • https://static1.squarespace.com/static/5fc58624bd14ff0dd2bbf2b9/t/5fcbdd8bb6b7366152051991/1607196043926/ronifexenewakufev.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_off0000e206.bin
c726c6678f38b2c9cb7f1387386549f3b8da63fc26c295f986894036324f1059
pdf-font-stream PDF embedded font (sfnt) at offset 0xE206 5356 bytes
font_01_sfnt_off0000f415.bin
927ea6babad6ec039f97de045cd359fea8011b8e8395266db246a6c9a3f3ff0a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF415 11436 bytes
font_02_sfnt_off00011b2b.bin
1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2B 1736 bytes