Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64b26942e4ae734…

MALICIOUS

PDF

70.8 KB Created: 2021-06-07 12:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9349bebf9fb8d30d9f3293216b4a232c SHA-1: 66d000f27c13365e467f0bce5ae27d5e4241085b SHA-256: e64b26942e4ae73437cf7eb7ea3380b0717f9dd4504f37c7a4c456f5533a2fbf
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The embedded content, though heavily obfuscated, likely serves to direct users to these malicious URLs, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://krisoc.ru/pbw?utm_term=capsa+susun+di+ios PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373505/normal_5ff003a942168.pdfIn PDF document text
    • https://lagizipat.weebly.com/uploads/1/3/2/6/132681030/salikoxes-pewusazomiv-gigoxawizudal.pdfIn PDF document text
    • https://luvumape.weebly.com/uploads/1/3/4/4/134438520/vukevuloxuwun.pdfIn PDF document text
    • https://favesalaliba.weebly.com/uploads/1/3/1/3/131384568/pakejibuwotafedeved.pdfIn PDF document text
    • https://nopivetof.weebly.com/uploads/1/3/4/5/134581756/309e5f00ffdc0eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461229/normal_5fcbe1decbf00.pdfIn PDF document text
    • https://pafebexazare.weebly.com/uploads/1/3/1/1/131163914/jibodoselobanas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493227/normal_60354a2f507e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369308/normal_5fdc326be81be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450248/normal_6056c66d915f9.pdfIn PDF document text
    • https://tudepaweper.weebly.com/uploads/1/3/4/6/134607512/2970218.pdfIn PDF document text
    • https://farunigi.weebly.com/uploads/1/3/4/7/134716297/3e15b6d131d5b1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402940/normal_5fece7c7d66db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_606daae5dcdfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389816/normal_601dd906d885e.pdfIn PDF document text
    • https://karewugudamebag.weebly.com/uploads/1/3/3/9/133986918/b1435c3f9de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dipoziw.pbworks.com/w/file/fetch/144439923/85669786973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a00bcac1-0e66-4830-a6b4-26fd845d9798/the_golden_thread_esoteric_hitlerism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/336290a7-9da5-4e41-b23c-ee6b4ae2e1b3/tomesisowisixerurikid.pdfIn PDF document text
    • http://wijozuzapusa.pbworks.com/f/guzupuruxewuxufawijoke.pdfIn PDF document text
    • http://gejigavowule.pbworks.com/w/file/fetch/144714333/cuando_una_vela_se_pone_negra_que_significa.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_off0000d69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69E 4728 bytes
SHA-256: d70245d681df77838c40d2a2cf4dadb31579396b85142f9ba51a6ca160cf617c
font_01_sfnt_off0000e6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C0 11644 bytes
SHA-256: b27f6ad46591b70c02bd9b92a624579a7bb51295d2e1ea2e769f13da074f3820