Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dde65b2b8165769…

MALICIOUS

PDF

83.1 KB Created: 2021-03-15 20:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 838cbb75b609c663f38a2f5b22f2db72 SHA-1: 8ee0b9c588d558d8021d34b13b3e1b6bea051556 SHA-256: 2dde65b2b8165769e4312886bd1ffdc4eefeaee6ca083e66b0e6c7b25c117fa1
176 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on dynamic DNS services and Weebly subdomains, suggesting a link farm or phishing infrastructure. The heuristic 'PDF_SEO_LINK_FARM' and the presence of a URL with 'travel notification chase' in its query parameter strongly indicate a phishing or scam attempt. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://soxebez.ru/wix?keyword=travel+notification+chase
    • https://cdn.sqhk.co/tavevalurov/6ibhigg/stretches_for_flexibility.pdf
    • https://cdn.sqhk.co/bapuparit/oicgcRU/bass_booster_bluetooth_speaker_headphones_pro.pdf
    • https://wipasajumavadus.weebly.com/uploads/1/3/4/7/134775966/senazu-limadigugazota.pdf
    • https://jonumijam.weebly.com/uploads/1/3/0/7/130739239/1360433.pdf
    • http://riniwovefaraw.22web.org/letter_format_for_granting_permission.pdf
    • https://badivilaw.weebly.com/uploads/1/3/4/8/134848312/f070ce44f6a8b3.pdf
    • https://tuxedibuzi.weebly.com/uploads/1/3/5/3/135350702/d22eb5fee.pdf
    • https://tabuwesajusa.weebly.com/uploads/1/3/1/8/131856124/aa0ed9fde.pdf
    • https://gorelafuxom.weebly.com/uploads/1/3/4/4/134497365/pagukusupulolip.pdf
    • https://cdn.sqhk.co/rurufimibiwe/gjPpj3E/molegat.pdf
    • https://cdn.sqhk.co/kupuvikadob/avnspWh/bubble_pop_games_for_free.pdf
    • http://zukoretevir.medianewsonline.com/xojalinik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://saluwagasa.onlinewebshop.net/wupinovijezidikudoduded.pdf
    • http://koxowasone.epizy.com/honda_pilot_2009_manual.pdf
    • http://solugivewatewa.myartsonline.com/5479243681.pdf
    • http://lelikerakovet.atwebpages.com/start_late_finish_rich_by_david_bach.pdf
    • http://jujageritoxo.atwebpages.com/philips_series_5000_change_head.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e548.bin
8b167546d94de2078f685db0c38691ca4369b688478a2aaa3f07e6aeaabc6e91
pdf-font-stream PDF embedded font (sfnt) at offset 0xE548 4768 bytes
font_01_sfnt_off0000f56d.bin
f53a911a37c8fce76bd6ff100a4b0735d9cd1e668e971016f8ade521f41ceeef
pdf-font-stream PDF embedded font (sfnt) at offset 0xF56D 10916 bytes
font_02_sfnt_off00011aee.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEE 16312 bytes
font_03_sfnt_off00013079.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x13079 4324 bytes