Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6aac484820e587a…

MALICIOUS

PDF

78.2 KB Created: 2021-03-25 06:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74f8be6468e9408712339b5f4a4cf040 SHA-1: 76de0f91826a6310b2e426bcb8dd857ff199f93f SHA-256: c6aac484820e587a94822c47a53e8c315fb0979aa94fcc7c03df49471a74d54b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though partially corrupted, suggests a lure related to 'national cervical screening guidelines'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://ponafet.ru/123?utm_term=national+cervical+screening+guidelines+nz
    • https://cdn.sqhk.co/texojijoraso/iigdRaI/toca_boca_life_world_update.pdf
    • http://mitatizizuje.mypressonline.com/5705172908.pdf
    • https://cdn-cms.f-static.net/uploads/4366987/normal_6028639f45db2.pdf
    • https://cdn-cms.f-static.net/uploads/4379961/normal_6041cfc423216.pdf
    • https://cdn-cms.f-static.net/uploads/4393506/normal_60525d7158938.pdf
    • https://cdn.sqhk.co/mixubiki/gYigijH/32821467248.pdf
    • https://cdn-cms.f-static.net/uploads/4444875/normal_600fa654d0240.pdf
    • https://cdn-cms.f-static.net/uploads/4373768/normal_601e83ba4d938.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fbe049ef-8a1c-448d-8fa6-42c36f9c72cd/61906305819.pdf
    • https://s3.amazonaws.com/ganubifirigevi/32570960387.pdf
    • https://s3.amazonaws.com/gelawiweza/marvel_s_inhumans_episode_guide.pdf
    • http://nizowozutagele.atwebpages.com/69155036505.pdf
    • https://s3.amazonaws.com/votubukaxogilix/payment_voucher_template_psd.pdf
    • https://uploads.strikinglycdn.com/files/8b18ac54-357f-49b5-a61a-ccfea3745987/85941306575.pdf
    • https://s3.amazonaws.com/sogovekevi/begozijunowegun.pdf
    • https://s3.amazonaws.com/kumasala/xunizazopitijiduwa.pdf
    • https://uploads.strikinglycdn.com/files/cc85b705-3e5c-4b77-9bcd-f152cb18af97/rugefakumexolemavegakotep.pdf
    • https://uploads.strikinglycdn.com/files/8548a348-c048-4269-8655-089d0e76ac9f/cisco_sg200-26.pdf
    • https://uploads.strikinglycdn.com/files/05d6326d-503d-4e6c-83c3-80a9eeaa6d1e/bojatiluramokoma.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_off0000f449.bin
cc43f2da7d4363a3d556eb611361ee5aead5d185b8f3b92eabe781cb4301d62e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF449 5184 bytes
font_01_sfnt_off0001060d.bin
b97306ef9ec0e4295a07057b45a3eada08034fedcb820b1c1bdd31807454df9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1060D 11028 bytes