Malicious PDF — malware analysis report

Static analysis result for SHA-256 c236b944a425a11d…

MALICIOUS

PDF

77.7 KB Created: 2021-01-05 06:37:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 415817cad34207f2d5981b2e5e8e05cd SHA-1: 31aa2928efbe890d9b007790bee8a24f09fd5a0d SHA-256: c236b944a425a11db9d942e2ea139c6977da4f613747735506bdd3acb9709df5
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains and redirector infrastructure, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the nature of the embedded links suggests a potential for malicious content delivery or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffmen.ru/aws?utm_term=compare+and+contrast+essay+worksheet+pdf In PDF document text
    • https://cdn.sqhk.co/dijobika/ROWTCsO/whatsapp_stand_alone_apk.pdfIn PDF document text
    • https://mubuzetuwifo.weebly.com/uploads/1/3/4/7/134703000/gerevumakumun-ginimobure.pdfIn PDF document text
    • https://lanuwoga.weebly.com/uploads/1/3/1/6/131637333/5857477.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/e27909d0be.pdfIn PDF document text
    • https://wopusuxosar.weebly.com/uploads/1/3/4/5/134583764/poxidopovobeneroz.pdfIn PDF document text
    • https://mumifigade.weebly.com/uploads/1/3/4/3/134314269/tezevok_vixepewugobumop_wiluw.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/rhhHmsE/zogofamowutobadoxe.pdfIn PDF document text
    • https://butevexonukuzi.weebly.com/uploads/1/3/2/6/132681970/galodivixopex-midixed.pdfIn PDF document text
    • https://ponatuxo.weebly.com/uploads/1/3/4/5/134596183/3410786.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/gupuso/lefekipanovemevabapotip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c89d1ef8-9a11-4c24-96d4-4f7a15f18516/all_game_fudge_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca680435-2e64-4bbb-b881-597578fb2cf0/17619395251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2d8afda-4ed6-497e-8e9f-78f063fbf4d5/vovumaxisejosanewibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f56a38c-3a1b-4f48-9700-1323663131ba/fefolakusabimexered.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d798a2-17d5-4b49-adc0-4c496fabd539/dalizir.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_off0000f2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A4 5524 bytes
SHA-256: 3c830274a84087b2fa0b961eec7d40169117d058e987fc67f61cdf22847be6bb
font_01_sfnt_off00010557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10557 10636 bytes
SHA-256: e1dd48be217001d887fdf417e8f8d7cee420011ae8678fa7c7a47a485e5f349f

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