Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb36544ae40ad6d1…

MALICIOUS

PDF

137.4 KB Created: 2021-03-08 16:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6d62ef761a1d67b8716fd455f1497871 SHA-1: dbfdd86a1e00532aed3ba97ac070fd614f78448f SHA-256: eb36544ae40ad6d1129796619c0092ce631b799e5b66f344401f8a944e3b77f3
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to the embedded URLs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://nipisod.ru/award?keyword=bacteria+staphylococcus+aureus+pdf PDF link annotation
    • https://cdn.sqhk.co/xolovagi/iaXhbhb/lozozobolodajapimoweso.pdfIn PDF document text
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/9074464.pdfIn PDF document text
    • https://cdn.sqhk.co/deliwewofok/Y1XIwig/spinel_steven_universe_movie.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/127c2b80d7c53.pdfIn PDF document text
    • http://bluetea.space/32878491485esbf.pdfIn PDF document text
    • https://bipozoxadedisaj.weebly.com/uploads/1/3/1/1/131164124/fuloxirelibu.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/vghhdic/ultimate_robot_fighting_mod_apk_unlimited_money.pdfIn PDF document text
    • http://eurosett.net/lopososutosidapeguv1uv.pdfIn PDF document text
    • http://bukuminuwakub.mypressonline.com/zulejubixuwus.pdfIn PDF document text
    • http://distornyup.site/are_costco_protein_shakes_keto0rqa2.pdfIn PDF document text
    • http://wiinorama.space/belume61bjv.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/jfoN8lt/nyan_cat_ear_headphones.pdfIn PDF document text
    • https://daxixulo.weebly.com/uploads/1/3/1/0/131070202/xesosemavazizetiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bezorito/88622706567.pdfIn PDF document text
    • http://wokidomogu.onlinewebshop.net/17435479935.pdfIn PDF document text
    • http://limoxukuk.atwebpages.com/janesenopafemaravemiz.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/vevesiwokaxovunu.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E114 5396 bytes
SHA-256: 0354b3e31748a91eb6631fa2228130776bf309675c577041ea3a198873d1446f
font_01_sfnt_off0001f374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F374 16172 bytes
SHA-256: 1b1bb008d8a70ddb7f96009ff23d2fb0fe38ffa4f3ed0e7a2a4439b4407f512c