Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e251b1c5b6d830a…

MALICIOUS

PDF

79.7 KB Created: 2021-02-13 17:21:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4aa4efa8aa0af8b8e415247dd1ad60bd SHA-1: ce44f967cc1a6d58aa8684c1bc618520a0ee79df SHA-256: 7e251b1c5b6d830a93dd39d92e6b28d09d3de6f44142675c62c6453236ec0f1d
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of external links, with one heuristic specifically identifying a 'PDF link farm'. The document body, though heavily corrupted, contains references to 'wkhtmltopdf', suggesting it might be a generated document. The presence of numerous external URLs indicates an attempt to redirect the user to potentially malicious sites, aligning with phishing or SEO-based malicious content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wb?keyword=ways%20to%20automate%20excel%20reports PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479673/normal_600638b0e95bc.pdfIn PDF document text
    • http://ruszaimclub.ru/931936486945mqzn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451018/normal_5fdbd03c59b3e.pdfIn PDF document text
    • https://barobinamad.weebly.com/uploads/1/3/4/7/134756413/9906498b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459027/normal_5fd9314a43a5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403273/normal_602075396e91d.pdfIn PDF document text
    • http://kengoru.space/inventory_management_sample_template9skww.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/signing_naturally_7-_12mlog3.pdfIn PDF document text
    • http://emmetrix.net/realm_grinder_goblin_challenge_2o4ref.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/daselex/59486914860.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/55123661277.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/branches_of_science_and_their_definitions.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/etched_glass_vinyl_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/hockey_player_stat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/project_plan_timeline_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/33916077737.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/nojovalukejiber.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/12731547863.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_off0000f96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96C 5260 bytes
SHA-256: fc8b2629d52238befacb9e48297ca7c89c7a0652e2e53a026de097f4ac5ac4ce
font_01_sfnt_off00010b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B54 11272 bytes
SHA-256: ec936cc9af7298f5dec84a022823a3e846e21bb8241dcefce09e60b60cb9cd35

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