Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb913dbaabc091a2…

MALICIOUS

PDF

60.4 KB Created: 2021-02-24 09:55:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 535ec0412ca765261d2fa7666e9514ee SHA-1: 316aebfcddf3f8ba6648692f0d27646f96577962 SHA-256: eb913dbaabc091a20d544e0e6f1bb19c7ff7873bd352158b4821a3c5f5c07edc
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=theo+theodoridis+height In PDF document text
    • https://nugukijozagesek.weebly.com/uploads/1/3/0/7/130739433/55c3bfd00f9e174.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/how_to_train_shoulders_with_bodyweight4tc9g.pdfIn PDF document text
    • http://white-x.fun/rtos_tutorial_beginnersf4ijk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495975/normal_60072a4a475cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414174/normal_6017445eea79d.pdfIn PDF document text
    • http://matroskin.space/forks_over_knives_planyqm11.pdfIn PDF document text
    • http://silkhfig.bid/super_goal_soccer_gameom97a.pdfIn PDF document text
    • https://sererepe.weebly.com/uploads/1/3/3/9/133999843/6571693.pdfIn PDF document text
    • https://kewakovek.weebly.com/uploads/1/3/4/4/134467638/keraseriwedadov-liwalokulewisan-genoxi.pdfIn PDF document text
    • http://baugroup.info/happier_ed_sheeran_ukulele_play_alongl6o4h.pdfIn PDF document text
    • https://xonatiwomunonow.weebly.com/uploads/1/3/1/8/131856992/9844032.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/jagux/android_developer_course_in_indore.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000b041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB041 4792 bytes
SHA-256: 41792fb7e6d4206b23a8ba955b34c0fb0f3b02c1fd0fd98b12fe0ee867c76fde
font_01_sfnt_off0000c085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC085 10360 bytes
SHA-256: 914339a60454321d0c5367e615dc1c07e8840b85472b7a399b640fa30ab5384b