Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae83b5351dca92b8…

MALICIOUS

PDF

73.4 KB Created: 2021-02-21 02:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 604ffc53b6393a3daa736820d20d6288 SHA-1: fc50f0a555efa5dab916c9a0647fe82f732ad2b0 SHA-256: ae83b5351dca92b8376289fc892fa00fd8e4ace322eb2c75d655008cd9bfa1ae
244 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. One of the embedded URLs, 'https://yafferge.ru/strik?utm_term=pet+sematary+original+full+movie+online', is flagged as a malicious redirector. The presence of PDF-specific heuristics and ClamAV detection further supports its malicious nature, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/strik?utm_term=pet+sematary+original+full+movie+online In PDF document text
    • https://static.s123-cdn-static.com/uploads/4426972/normal_5fef1b00341d1.pdfIn PDF document text
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/acecef2f4.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/ggjf7gj/love_live_school_idol_festival_allstars_tier_list.pdfIn PDF document text
    • http://whysmall.space/ielts_writing_task_2_questions_20197rqx2.pdfIn PDF document text
    • http://tk-pobeda.site/79554058584uu75r.pdfIn PDF document text
    • http://hangookoil.ru/warrior_princess_final_run_apkltr3l.pdfIn PDF document text
    • https://kibidabusiben.weebly.com/uploads/1/3/1/0/131070702/toguv_todotepaxiwe_zavivuxevabi_tuduza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454425/normal_60190a79c31f2.pdfIn PDF document text
    • https://lijoliwaxodoxi.weebly.com/uploads/1/3/1/3/131398144/372930c8ee14.pdfIn PDF document text
    • https://vedagerirujo.weebly.com/uploads/1/3/6/0/136055295/747170.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/biometric_screening_form_uhchg8m2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491965/normal_600fbcc369122.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/d32dbb97168a4a.pdfIn PDF document text
    • https://ninisajata.weebly.com/uploads/1/3/4/8/134869212/latalix-gojexepukemorur-vasowepinin-wopeka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE301 5248 bytes
SHA-256: 6027b2b27ad63ce5c6b52be252fbcdb12e4c99aac30de59c2b74243bee31ba8b
font_01_sfnt_off0000f4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D4 10596 bytes
SHA-256: 86292d2b5396906a264cf2a832f6abc18b67eb1d77f0abb6567a131cd16e485b

Open this report in the interactive analyzer, or submit your own file for analysis.