Malicious PDF — malware analysis report

Static analysis result for SHA-256 d81305b48ee41997…

MALICIOUS

PDF

73.8 KB Created: 2021-02-15 20:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b9323de3cc8abcfb26061175555f6834 SHA-1: acded7d1587e40bc41de86d1d035e29f97d7b230 SHA-256: d81305b48ee4199708a7855a6c34b8269e1db519f483487aa8f391c7140ed6ce
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical detection for a link farm containing numerous external PDF links. The ML classifier also returned a high confidence score for maliciousness. The presence of embedded URLs suggests an attempt to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://baarspo.ru/123?utm_term=2003+jeep+liberty+2.5+inch+lift+kit PDF link annotation
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/7761834.pdfIn PDF document text
    • https://riwumoba.weebly.com/uploads/1/3/5/9/135965326/27d9f893f6.pdfIn PDF document text
    • http://2gusevshop.space/budidaya_andalimanic62s.pdfIn PDF document text
    • https://boretenewur.weebly.com/uploads/1/3/1/4/131453221/3540328.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/00e65f09e547af.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/dWHBjje/jiffy_lube_near_me_open.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/eAXHNTo/love_letters_in_the_sand_chords.pdfIn PDF document text
    • https://maxijegiv.weebly.com/uploads/1/3/4/1/134131269/roropowijira_nilowosoje_jamedukilamita.pdfIn PDF document text
    • http://vovality.club/junowukibcd6s.pdfIn PDF document text
    • https://kinifuromokemo.weebly.com/uploads/1/3/5/3/135348191/xapogedufakelasi.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/gehd64V/gipalisebezosita.pdfIn PDF document text
    • https://denuxikunoleluj.weebly.com/uploads/1/3/4/0/134018299/2911505.pdfIn PDF document text
    • http://shoop-fh.ru/87782907675dj05t.pdfIn PDF document text
    • http://regvoolkim.website/startup_pitch_powerpoint_templateri0wq.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/piwupevivotixi/add_hyperlink_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/18917986879.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/technique_assemblage_charpente_bois.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/glow_party_flyer_template_free.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_off0000dfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEE 5596 bytes
SHA-256: 231ef6adc5519cfe5620e2cff77787b80a1893af5dc5aaec034864575d6627c7
font_01_sfnt_off0000f318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF318 11564 bytes
SHA-256: 12a1bf3786531a57d3f7b610a0c8015a28580a96853b8080e6375edebd228ac5

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