Malicious PDF — malware analysis report

Static analysis result for SHA-256 928b366a6df3969c…

MALICIOUS

PDF

72.7 KB Created: 2021-04-03 23:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 519a6d3ea2066573a26616a464dcd1c2 SHA-1: bc5c68bd16626a411528430f56705c4f70a2b512 SHA-256: 928b366a6df3969c3a761848b705a699f4dd492c1c08cfb02cad656a32d8b536
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://dugedepap.ru/wix?keyword=xfinity+xr11+remote+codes', which is likely part of a phishing or SEO scam. ClamAV also detected this as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-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://dugedepap.ru/wix?keyword=xfinity+xr11+remote+codes
    • https://cdn-cms.f-static.net/uploads/4447252/normal_6046ec6a48ba0.pdf
    • https://cdn-cms.f-static.net/uploads/4475866/normal_5fd9a3eb7d045.pdf
    • http://winsl.space/zaxotigofowulodim974od.pdf
    • http://woodlesenka.ru/how_to_find_my_sim_location0n0op.pdf
    • https://befunopokoxa.weebly.com/uploads/1/3/5/3/135327779/07fefc2fb068eb.pdf
    • https://mulodunewumil.weebly.com/uploads/1/3/4/3/134314444/rawitotogerubonuvuv.pdf
    • http://detonic-official.website/t95m_tv_box_manuali7myp.pdf
    • https://cdn-cms.f-static.net/uploads/4387571/normal_5fd86de2b9366.pdf
    • https://cdn-cms.f-static.net/uploads/4485580/normal_60540476ca428.pdf
    • https://static.s123-cdn-static.com/uploads/4421768/normal_5fc92442c6f9d.pdf
    • https://mipapipav.weebly.com/uploads/1/3/4/0/134012398/482185.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rebikesumusosu.rf.gd/army_football_schedule_2020.pdf
    • https://5637a596-61ce-4e67-8953-8fd9cb84b940.filesusr.com/ugd/c20ea7_09a03df4885141cf8dbc0e80d050dfe6.pdf?index=true
    • https://1b2c4efd-c8eb-4b04-b26f-b9154d704720.filesusr.com/ugd/d3758e_ec0e8ca9913c49b7a9384f717cc8fbf2.pdf?index=true
    • http://depepok.rf.gd/ccat_test.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_off0000df8b.bin
7486af0cb5f3ec46d36bc8ac4953ae8abea01bce501068b36d83330160d8603c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8B 5124 bytes
font_01_sfnt_off0000f0f8.bin
813cad20c4f4fd216343ab27856e7a9bbc2b87285a285ee3fc5cb5f6594561ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F8 10976 bytes