Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd7204dfa7400de…

MALICIOUS

PDF

70.6 KB Created: 2020-11-25 16:12:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e55bb0613187dc0afed7844c7847840 SHA-1: 1bc392178d35d6aa11e65ba289c9fec576ff2fb2 SHA-256: 6bd7204dfa7400de8a9e3b7c1a5e58e44397c0f3ce3a881e8050f07731cbdb46
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to link farms, indicating a phishing or scam attempt. The presence of a URL related to 'fortnite hacks pc free v bucks' strongly suggests a lure to attract users. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=fortnite+hacks+pc+free+v+bucks
    • https://sevivuninuk.weebly.com/uploads/1/3/4/4/134459749/noberalakuxujodew.pdf
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5fbdfb5bf2d2f.pdf
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f8f4d19b2511.pdf
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/7526000.pdf
    • https://cdn-cms.f-static.net/uploads/4489975/normal_5faf5080a29d4.pdf
    • https://fokomowopijav.weebly.com/uploads/1/3/4/6/134643156/komujewo.pdf
    • https://cdn-cms.f-static.net/uploads/4379355/normal_5f8e51c94ec3c.pdf
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/sifalunadasonov_xujubuzejokol_kedeku.pdf
    • https://cdn-cms.f-static.net/uploads/4379046/normal_5f90338dc6f16.pdf
    • https://mepetimis.weebly.com/uploads/1/3/1/4/131483418/depenevopesepubet.pdf
    • https://jojawetoterul.weebly.com/uploads/1/3/4/4/134404105/54ddd8d90.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8702cf7d-977d-4ed9-ba8f-69cdb939aedc/zakutulibipakar.pdf
    • https://s3.amazonaws.com/mulerux/sky_hd_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbc9.bin
82c9a5b4af55426c751ad8499acbee3a2ba8cb6856f1a9fb2ac77b3926d79a27
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC9 5292 bytes
font_01_sfnt_off0000ddc4.bin
78e94e2e47178245ca437e301e19f50dc99845ecc02da2ba30fe2b1e34051cc2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC4 2092 bytes
font_02_sfnt_off0000e769.bin
13f2a6b49983f145e47829a081d7c64f891bccbe62236f7eb91947076f1a57c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE769 11060 bytes