Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0ecf63da0e7eed…

MALICIOUS

PDF

71.0 KB Created: 2020-11-11 10:19:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4563a0bfe75e61dc0604ac2ebc7e40a6 SHA-1: 778359658786b8d35e5e35e03473e716b0ea4336 SHA-256: 7f0ecf63da0e7eed0e83fed0e44ede42681d95ac16cbcca82d636b64d5061a50
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link leading to 'trafficel.ru' disguised as a search result for 'steampunk weapons for sale'. This suggests a phishing or content-luring tactic. The presence of a PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to distribute malware. ClamAV detection and ML classification confirm the malicious nature of the file.

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://trafficel.ru/123?keyword=steampunk+weapons+for+sale
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/rozufagalulur.pdf
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/monedivefiz.pdf
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f9c5743b3a79.pdf
    • https://xavupavise.weebly.com/uploads/1/3/4/5/134584264/b5b482d90328065.pdf
    • https://xebololu.weebly.com/uploads/1/3/4/3/134340913/webefug.pdf
    • https://demijejave.weebly.com/uploads/1/3/4/6/134607426/lilado_samasa_doxobilofezugu_gadurulupig.pdf
    • https://cdn-cms.f-static.net/uploads/4391302/normal_5f9a8922526d0.pdf
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/d3e4ca9503a7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/midaguvimabof/wadixasuxodu.pdf
    • https://uploads.strikinglycdn.com/files/2b69cd44-c5c2-4c45-ae59-f318c1cdbb5c/sagusugalinozap.pdf
    • https://uploads.strikinglycdn.com/files/a3a20e86-7b3e-4382-a327-de0b6222df71/stellaris_infinity_machine_fleet_power.pdf
    • https://uploads.strikinglycdn.com/files/96a6a1e1-4c7b-47f9-bf13-41723995201c/jogutamapekogasovizos.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/wisconsin_age_of_consent_for_treatment.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_off0000d8b1.bin
2bfb5bd5f49a28fcbbcad2b8c5dcaa0b5331546de8f2a0343dc95ba54120b33b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B1 5304 bytes
font_01_sfnt_off0000eab8.bin
64c749d99afbaccb5d139ddf310688f1e915f8f4353526ba1eef7ca5737cce91
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB8 10388 bytes