Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08deedc97ec382c…

MALICIOUS

PDF

69.3 KB Created: 2020-11-24 22:17:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcd64474d21c153ac3b3643635faa549 SHA-1: 179a0ee44f2165b3682fa44558684fc819dc442e SHA-256: a08deedc97ec382cbfa4fb9e6463c7324f2b9b50f7e4b081075c89401b996c72
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, with one pointing to 'https://traffine.ru/strik?utm_term=bed+bath+and+beyond+bed+skirt+pins', suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to contain search-related terms, reinforcing the lure. No scripts were extracted, but the PDF structure and numerous external links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=bed+bath+and+beyond+bed+skirt+pins
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f88fe6a8be1a.pdf
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/1252420.pdf
    • https://cdn-cms.f-static.net/uploads/4443809/normal_5fb78138c49c4.pdf
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f875edf66fbb.pdf
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f877eee9d1de.pdf
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/c45685f.pdf
    • https://cdn-cms.f-static.net/uploads/4379618/normal_5f98a528b644c.pdf
    • https://cdn-cms.f-static.net/uploads/4446930/normal_5faed1e6e254f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kavitokolezub/41694105447.pdf
    • https://uploads.strikinglycdn.com/files/4074f116-7bd6-49cd-9505-4fdc78745752/gonuburudokotugudaxif.pdf
    • https://uploads.strikinglycdn.com/files/385e830a-ecf3-46b1-9466-bfa06a4672bd/fazetupediletejuvijobuza.pdf
    • https://uploads.strikinglycdn.com/files/c1a1f327-41a5-4a46-818a-ea8a614b7587/47445544442.pdf
    • https://s3.amazonaws.com/tutasujal/dotonbori_shopping_guide.pdf
    • https://uploads.strikinglycdn.com/files/d63d5cef-de2a-4b48-90d0-a2927787aa65/dna_the_double_helix_coloring_answer_key.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfe4.bin
83f30cc04aa67531c16de6c46ce1c82639a5d29c7557f181f6bfdafd3fc3f990
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE4 5368 bytes
font_01_sfnt_off0000e223.bin
a963e9bf2941c2e9ab8bdee7b351ac7292ed84e5e06b1bb179b13c7e6d469469
pdf-font-stream PDF embedded font (sfnt) at offset 0xE223 11484 bytes