Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c7d7b6852eac5d5…

MALICIOUS

PDF

73.3 KB Created: 2021-01-12 23:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 95fdf168fd734327a262439a6302a648 SHA-1: 105846b2944112c1d0698b8cf0c4e1ee777a8562 SHA-256: 2c7d7b6852eac5d5ef116225ec3d733e6e292814dc4c7812a41590e69d6d97f9
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://traffking.ru/123?utm_term=peavey+rage+158+schematic+pdf PDF link annotation
    • https://zujefimobob.weebly.com/uploads/1/3/1/4/131453463/mikelijus.pdfIn PDF document text
    • https://site-1166673.mozfiles.com/files/1166673/65915997885.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepilekot/h2h4iax/enlisted_ranks_in_the_british_army.pdfIn PDF document text
    • https://papozigej.weebly.com/uploads/1/3/1/8/131858530/jipatatibe.pdfIn PDF document text
    • https://site-1180426.mozfiles.com/files/1180426/bevupapifezodof.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/duhiFOQ/mebikugurefeg.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/konadiza-bosasuzigawe-giwabujesavetu-nadakuje.pdfIn PDF document text
    • https://vumerajijo.weebly.com/uploads/1/3/2/8/132815742/nibes.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/agghHHV/zoxomoxejotibufuxuzerazaz.pdfIn PDF document text
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/b2f0b1a2d.pdfIn PDF document text
    • https://gebekogekikak.weebly.com/uploads/1/3/4/6/134694855/2fc59eda218.pdfIn PDF document text
    • https://cdn.sqhk.co/zewuxumaro/hjgzijl/patrick_superhero_name.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/labitajaxatufib/google_spreadsheet_script_copy_paste_values.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/char-_broil_performance_tru_infrared_grill.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2C 6068 bytes
SHA-256: 03ebb12ca23cbaf17f75daf5e2744c9f5f2712a8086c573087bb0b4cde672c3b
font_01_sfnt_off0000f0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C1 11688 bytes
SHA-256: 089f9ff2eb0547aa8c79d51c4a4d5cd267b7e236d53d45c49f3ea71ae931a5c7

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