Malicious PDF — malware analysis report

Static analysis result for SHA-256 973a08e07c8c27b4…

MALICIOUS

PDF

79.0 KB Created: 2021-02-14 01:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 553648683cfd27cb907b3249b2bce651 SHA-1: d87569714e0b8289c8298891420e86b8754229a9 SHA-256: 973a08e07c8c27b499e305854fe6ed4b27e7254ee8d8ccbef96205db680ef969
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a large number of external links, suggesting a link farm or phishing attempt. The primary URL, 'https://seumenha.ru/wix?keyword=cummins+onan+marine+generator+service+manual', is presented as a service manual to disguise its malicious intent. No scripts were extracted, but the sheer volume of outbound links indicates a high likelihood of redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=cummins+onan+marine+generator+service+manual
    • https://cdn-cms.f-static.net/uploads/4464065/normal_5fd6837f5f9e9.pdf
    • https://cdn.sqhk.co/jekefebiba/hcihEic/amazon_go_jobs_near_me.pdf
    • https://mumanewuneju.weebly.com/uploads/1/3/2/7/132712109/d6d8a75efad73f6.pdf
    • https://cdn.sqhk.co/muligumixe/hdhiLAT/4_pics_1_word_reloaded_level_328.pdf
    • https://cdn.sqhk.co/torujazelome/pjbYChb/townkins_wonderland_village_mod_apk_1._8._193.pdf
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/6962584.pdf
    • https://static.s123-cdn-static.com/uploads/4459322/normal_5fcd8a9541b31.pdf
    • https://cdn.sqhk.co/gawagunikuw/fBjecD4/riladixanesepujalovirit.pdf
    • https://cdn-cms.f-static.net/uploads/4497109/normal_5fe8bf2b1cace.pdf
    • https://static.s123-cdn-static.com/uploads/4443610/normal_5ff6b6b5e79e3.pdf
    • http://avto-trokot.xyz/family_feud_live_play_with_friendsgakac.pdf
    • https://gepadera.weebly.com/uploads/1/3/0/7/130740344/finudal.pdf
    • https://wejowijugoli.weebly.com/uploads/1/3/1/3/131383775/varusotolu-xogogafatu.pdf
    • https://static.s123-cdn-static.com/uploads/4497688/normal_5fec68de75fee.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tosego/98997521694.pdf
    • https://s3.amazonaws.com/jolozidabi/39006756413.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_off0000f946.bin
445e407b00deafa046f07e4ef18ede4f0482e0bb8aa1611e5cff739efc2b1eb6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF946 5084 bytes
font_01_sfnt_off00010a7f.bin
4f7b8e51e791ef625e4c91c7b5258d01f456ea4f5ac1a3880f58017798018aa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7F 10632 bytes