Malicious PDF — malware analysis report

Static analysis result for SHA-256 60cf2d95f26dcfb0…

MALICIOUS

PDF

66.5 KB Created: 2020-12-22 19:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cf747cf009fdc6b2b24427d34fe399a SHA-1: 7718ee41b0258639e4206740f0b515532bc7a75b SHA-256: 60cf2d95f26dcfb000ce0e875531205502aa1c18d1865954a782b7f13faeeacc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for a phishing trojan. The presence of a large number of external links, many pointing to PDFs with numeric slugs, suggests a link farm or SEO poisoning attempt. One of the external links, https://traffset.ru/aws?utm_term=jotun+barrier+technical+data+sheet, is particularly suspicious and likely serves as a lure or a redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/aws?utm_term=jotun+barrier+technical+data+sheet
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/wejuranowuwoz_lekexosas_minasolanikef_beduta.pdf
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5fae7fc4a6284.pdf
    • https://pelosewedi.weebly.com/uploads/1/3/4/7/134753512/2400559.pdf
    • https://cdn-cms.f-static.net/uploads/4495244/normal_5fad65ae18a7e.pdf
    • https://cdn-cms.f-static.net/uploads/4393776/normal_5fbbb51cb834f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5a2132d9-4933-48ab-af70-6bde50fe4d2c/jelaxikadurewar.pdf
    • https://uploads.strikinglycdn.com/files/a929d9b2-32e3-4df8-9aa5-a23bf810a9cb/wezozuvew.pdf
    • https://uploads.strikinglycdn.com/files/d447477f-1591-4d80-8706-c1c6bfa6a743/97204765544.pdf
    • https://s3.amazonaws.com/jovekus/natural_apricot_seeds_that_cure_cancer.pdf
    • https://uploads.strikinglycdn.com/files/f23324c0-fab5-4301-afa1-60de32a0b1c7/pinovanixovikava.pdf
    • https://uploads.strikinglycdn.com/files/a7b94b6f-bb1c-427b-a2b6-b6a6561c2270/leyenda_del_cadejo.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_off0000c8b7.bin
b840da28a8594958bf89c6efd5e0fb7db2aa5279e9414c1e23a24e203e0fda78
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B7 5156 bytes
font_01_sfnt_off0000da2f.bin
ba74b09447746fd9417d34e407825b927ddaaf39b49e6ca968649caadbeebe5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2F 10368 bytes