Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7bef2f7e58b48c8…

MALICIOUS

PDF

79.3 KB Created: 2021-03-22 10:05:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a8640ddb34286dea3c9c2a2d60a141f SHA-1: 397ef0c92e23824cc49338325b493b649540c79c SHA-256: e7bef2f7e58b48c868913cae9cf34bbc13650fa2f05bb6ae0f373964241d2ae2
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'seumenha.ru', which is likely part of the phishing or malware distribution infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'knee pain arthritis exercises'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://seumenha.ru/award?keyword=knee+pain+arthritis+exercises+pdf
    • https://cdn-cms.f-static.net/uploads/4390069/normal_6058066b2d268.pdf
    • https://cdn-cms.f-static.net/uploads/4384048/normal_603fdbec4a672.pdf
    • https://cdn.sqhk.co/wemorapi/MWhiEyi/elifoot_19_pro_download_pc.pdf
    • https://cdn.sqhk.co/zofonabiz/hbBijii/sad_meme_stickers_for_snapchat.pdf
    • https://static.s123-cdn-static.com/uploads/4488090/normal_5ffa008aa3e4b.pdf
    • https://cdn.sqhk.co/jopogoxom/higghjP/wijifisetoborekukolod.pdf
    • https://cdn-cms.f-static.net/uploads/4452161/normal_600cb7dc240e3.pdf
    • https://cdn-cms.f-static.net/uploads/4403404/normal_603e6a759bd80.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/viromibukoleliw/amazon_silk_browser_for_android_tv.pdf
    • http://gikipixuvi.rf.gd/wipexun.pdf
    • http://fetevatakipip.epizy.com/difazotogoj.pdf
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_7275960230ed434796b69150ec1ea81a.pdf?index=true
    • https://s3.amazonaws.com/jipowumat/womubato.pdf
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_1bdf2b388b7246b3838252d27c368c15.pdf?index=true
    • http://madepubas.epizy.com/ramas_de_la_arteria_iliaca_externa.pdf
    • https://uploads.strikinglycdn.com/files/1cae5ce5-6a3d-4c5a-aa89-1306ca76f9d6/burris_eliminator_3_4x16x50.pdf
    • https://s3.amazonaws.com/sajatofubote/80848367045.pdf
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_a77d3f9f69b74793b2fadb437885a1cf.pdf?index=true
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_e8280dbdefbd4dba8efbb3b9bab11f08.pdf?index=true
    • http://muwusub.rf.gd/99087881221.pdf
    • https://uploads.strikinglycdn.com/files/621ca21f-078c-4bb4-829d-6e5e7758beba/learning_american_sign_language_second_edition.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_off0000f9bd.bin
75ed90472d93e9307d98ae747146312ce5421150d0259deaf3b07966f3f7b657
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BD 5248 bytes
font_01_sfnt_off00010b9c.bin
6b64113752e9bde2fe3bcbb7519e583db1dab4023ebdc5b3d82f9c3dc7b5a462
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9C 10624 bytes