Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70f85a978571a73…

MALICIOUS

PDF

72.8 KB Created: 2020-11-14 12:06:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6c21a10c685396125cdce9e69ccb38e1 SHA-1: 7db5af8a27378ee5a280b12e56e96c3d1d4f6dab SHA-256: e70f85a978571a7315d5e9231abee9a8a05dbb2afbb39ce9652555bafcf151d7
156 Risk Score

Malware Insights

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

The PDF file contains a high number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The embedded URL 'https://trafficel.ru/123?utm_term=cosco+rise+booster+seat+manual' is suspicious, while other links point to benign content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO spam.

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://trafficel.ru/123?utm_term=cosco+rise+booster+seat+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455381/normal_5fa26edbad528.pdfIn PDF document text
    • https://wubigunes.weebly.com/uploads/1/3/4/5/134507070/4912907.pdfIn PDF document text
    • https://nisutezobeta.weebly.com/uploads/1/3/4/4/134486685/7070995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5f8d571b32041.pdfIn PDF document text
    • https://derejesi.weebly.com/uploads/1/3/4/3/134388634/totepejiwazi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_5f8a341a63da9.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/vixuwogetiv/23926126288.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/batman_pc_game_apunkagames.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/bautagebuch_vordruck.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/96926779318.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/how_old_is_kareem_abdul_jabbar_wife.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/k_mean_clustering.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_off0000e215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE215 4992 bytes
SHA-256: 4b1524bd46b5c8cc709ecb7aa30039b8ad7baf3bd1735821be36ec68c7c20dec
font_01_sfnt_off0000f2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 10560 bytes
SHA-256: d9bf5fc02aa88d98363f0bfea298e677dc2ceda1537a3d3270fccb0d68dca35e

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