Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd82e954a92dbfdb…

MALICIOUS

PDF

67.1 KB Created: 2021-01-02 13:15:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8e667500c28a31660b3cb9d1db0b5ae SHA-1: ba9f0be76d0571be5a2d6be25b6217376b03f785 SHA-256: fd82e954a92dbfdb84a13f3184924cb229c8f5fae2223920474ba4256817feae
156 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which, 'https://traffking.ru/aws?utm_term=boq+full+form+in+telecom', is flagged as suspicious and likely leads to a phishing or malware distribution site. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a spam or phishing campaign. ClamAV detection and ML classification further support the malicious nature of this document.

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://traffking.ru/aws?utm_term=boq+full+form+in+telecom
    • https://cdn.sqhk.co/dufadafakuti/hhgfeCP/71560797316.pdf
    • https://cdn.sqhk.co/xonoguduzob/ygiWjfv/basketball_shot_clock_buy_online.pdf
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f871d4a5ca76.pdf
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/987b21c6b.pdf
    • https://juxipidupe.weebly.com/uploads/1/3/4/6/134694928/nogalisazibolam.pdf
    • https://cdn.sqhk.co/muxigatatini/hiigejf/66764953277.pdf
    • https://cdn-cms.f-static.net/uploads/4389816/normal_5fa469f04fffd.pdf
    • https://cdn-cms.f-static.net/uploads/4408463/normal_5fe8a54555cc1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/panalipolifod/91420192881.pdf
    • https://uploads.strikinglycdn.com/files/669acd8a-cf8c-4b93-906b-cbfdbd3a2a77/50584004932.pdf
    • https://uploads.strikinglycdn.com/files/35ea1c89-1341-46ef-9b50-7a3e3326ca46/words_beginning_with_germ.pdf
    • https://uploads.strikinglycdn.com/files/c2c86ee4-377f-4554-8761-d972b640e067/losumazin.pdf
    • https://uploads.strikinglycdn.com/files/693403ce-8d2c-47e2-883a-65cef229f6a9/jujakarexisegiweposugug.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_off0000cbcc.bin
b075b2b9eee8c174b5b90da8bc1167df968e764a75c175b491d606c8355c4e58
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCC 4816 bytes
font_01_sfnt_off0000dc21.bin
9385fa3b3c08f95d4824bf6094315876c6f815ee12a3aad677c3c3ab9651b804
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC21 10860 bytes