Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cffadc370bc7827…

MALICIOUS

PDF

73.3 KB Created: 2020-11-25 22:42:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0f93d7c8bc84df42f00b5bfba8601ecf SHA-1: 116ce146bcd87b206690d18f753b9c8ca3a5cc2e SHA-256: 0cffadc370bc7827802c419282e16101445c916f25d7e17a47c40c305590c24b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 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://traffine.ru/strik?utm_term=new+england+cottontail PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f87fa8346511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5fa49b1910654.pdfIn PDF document text
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/vuvubiwi.pdfIn PDF document text
    • https://gawubodukajine.weebly.com/uploads/1/3/0/9/130969599/dafopobaxivefifo.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/a2b8a1decde.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/rebomedug/8473223404.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/a_posteriori_error_estimation_techniques_for_finite_element_methods.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/sabikoziv.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/aquabot_turbo_t_jet_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/acrobat_pro_xi_update.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/cal_fire_investigation_reports_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/dhgate_legit_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/89624672551.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EC 4896 bytes
SHA-256: 8c93a1e1d71d22575e7b82f1244b9d2a9ecf98b8a1e5e7ffd9a3138ad084dd8e
font_01_sfnt_off0000e8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C1 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0000f424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF424 10656 bytes
SHA-256: 7e6980aebd1e308a9e5fff0edbedbe9f7ad1d346c96aedb04658183ae6aa21fa

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