Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd872d7c5c6e67b…

MALICIOUS

PDF

74.6 KB Created: 2021-03-11 06:34:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1c08461e089e2d481421f7633d128af SHA-1: dc0657dd1eb0dd1dba31d2c90be7ab51c5e3bb55 SHA-256: ddd872d7c5c6e67bcf527d200dc01db2a40ddd3881b15bdbad8b9fadddb4bf8a
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'anterior tibialis tendonitis exercises pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/award?keyword=anterior+tibialis+tendonitis+exercises+pdf
    • http://tijudozi.scienceontheweb.net/what_is_a_low_purine_diet.pdf
    • https://static.s123-cdn-static.com/uploads/4457881/normal_5fced362d38d4.pdf
    • https://static.s123-cdn-static.com/uploads/4450247/normal_5ffca11ec71d4.pdf
    • http://tulusujubige.mygamesonline.org/how_to_get_the_bolt_action_rifle_rdr2.pdf
    • http://xokebidukefu.getenjoyment.net/60886995384.pdf
    • https://cdn.sqhk.co/fefamuve/rlbjdiT/battlelands_royale_hack_app.pdf
    • https://cdn.sqhk.co/xororasomig/jbgivwW/puwifamizerevere.pdf
    • http://potawuzaj.medianewsonline.com/82024694329.pdf
    • https://cdn-cms.f-static.net/uploads/4452609/normal_5fe8b6ecbc0e8.pdf
    • https://static.s123-cdn-static.com/uploads/4371536/normal_5fc875dae1c46.pdf
    • https://cdn.sqhk.co/bikawegaj/gc2jahb/piviru.pdf
    • https://cdn-cms.f-static.net/uploads/4416512/normal_60357077dc4fa.pdf
    • https://cdn.sqhk.co/wodelaganav/tAhgYmZ/anti_heroes_in_modern_literature.pdf
    • https://cdn.sqhk.co/sadamire/CGqihjd/63342665484.pdf
    • https://cdn.sqhk.co/tuparesoxaj/igzjcjV/4168585933.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0761ea8f-cbeb-433f-b725-43f056b15c9f/kitchenaid_ksm90pswh_mixer_parts.pdf
    • https://uploads.strikinglycdn.com/files/0fe108a5-9808-4337-a278-d532a3aaf44d/can_u_connect_subwoofer_to_soundbar.pdf
    • https://uploads.strikinglycdn.com/files/a60367f1-be3a-444e-9383-ea19ff47b2ec/bizegobotoxiwunojojevino.pdf
    • http://tifilow.onlinewebshop.net/nopel.pdf
    • http://bidajalej.onlinewebshop.net/durevuginuvogolevokefivi.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_off0000e8fe.bin
022d58ce899975acc0f5015f71383adacfb704835cd9e923dc70421d8790704d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FE 5348 bytes
font_01_sfnt_off0000fb3b.bin
b194a1df9fc04368cc6cbc097036be78adf054ede5c87311029d5f3a9deb2a64
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3B 9972 bytes