Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a7a7a11126b9e6…

MALICIOUS

PDF

88.8 KB Created: 2021-03-10 21:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a8ccc73814b8c050ebf553adade4b7ce SHA-1: f2a4f1c6609696938adccf67984e92d82336479c SHA-256: 02a7a7a11126b9e6c332c6f0cdb5b712b1afb6e06d2b454cd7d1696e71f30522
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable hosting services, indicative of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content or applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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.
  • 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
  • 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://gimoguvi.ru/123?utm_term=calculator+app+hider+apk+no+root PDF link annotation
    • https://cdn.sqhk.co/nilamemiw/oRjbHhc/61940617277.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413585/normal_600d7a7fe4656.pdfIn PDF document text
    • http://xodakarefadivag.iblogger.org/67189912408.pdfIn PDF document text
    • https://cdn.sqhk.co/wopeporamo/fYogcqK/super_mario_bros_gameboy_advance_rom_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/a5idjjV/mr._slice_mod_apk.pdfIn PDF document text
    • https://rufekelikofevav.weebly.com/uploads/1/3/1/0/131070689/lofeso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_60413ac925aae.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxamomajil/yiaVMV3/hitman_sniper_2_apk_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/HAigF1Z/nebi_film_photo_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/4rngjgj/new_dc_animated_movies_2021.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/bYhjicU/30336582971.pdfIn PDF document text
    • https://cdn.sqhk.co/pipagalax/esKAgji/how_to_draw_cartoons.pdfIn PDF document text
    • https://safadere.weebly.com/uploads/1/3/4/0/134018032/cf229ea89325.pdfIn PDF document text
    • https://cdn.sqhk.co/pisomuwesuk/CzXgfid/soccer_penalty_kick_statistics.pdfIn PDF document text
    • https://tunupufimudodo.weebly.com/uploads/1/3/4/3/134324073/mugozazubefifu.pdfIn PDF document text
    • https://woliwejimagevin.weebly.com/uploads/1/3/4/3/134319070/04887bdd7.pdfIn PDF document text
    • http://zejegilige.iblogger.org/how_to_do_pi_on_ti-30x_iis.pdfIn PDF document text
    • https://jitemino.weebly.com/uploads/1/3/0/9/130969659/5284869.pdfIn PDF document text
    • https://cdn.sqhk.co/sesumaku/idIMibo/68534696178.pdfIn PDF document text
    • https://cdn.sqhk.co/lefuwaregew/jzI2zhh/my_dream_life_home_design_story_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bozomeza.rf.gd/what_are_the_most_important_survival_skills.pdfIn PDF document text
    • http://renowuvix.epizy.com/android_onenote_sticky_notes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001102f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102F 4952 bytes
SHA-256: 91a60a9ab228a148f0e67a0e48819d9be5a385149ab04595cffd6795f7c1049e
font_01_sfnt_off000120f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F6 11188 bytes
SHA-256: a0222287c463a462251fe757e2b7b536c2137f9c5ab601da1941d11a4e7d3756
font_02_sfnt_off00014729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14729 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c