Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e1af90b6b05617…

MALICIOUS

PDF

80.4 KB Created: 2021-02-25 02:15:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3a5c5066612fcb9fbe390d439d4e7f90 SHA-1: b3d537727d61973b90fdedf69498619b6a42590f SHA-256: a5e1af90b6b05617f0c40ba8242ad65ab6491b2c905efee5284028c923a0dfd1
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with several pointing to known malicious redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be redirecting users to external sites, likely for phishing or further malware delivery, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=elements+of+design+space+interior+design In PDF document text
    • http://like-store.site/atlas_affet_indirp2g00.pdfIn PDF document text
    • https://cdn.sqhk.co/bewagolene/c2jto6H/44048945148.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/igQhhmV/jolegugixinaparediwum.pdfIn PDF document text
    • https://cdn.sqhk.co/riwewazisara/bjd70c7/danmaku_unlimited_3_tips.pdfIn PDF document text
    • http://trokot-new.online/rc_plane_2_music8hbey.pdfIn PDF document text
    • http://henrysavbr.site/which_smartwatch_is_best_under_5000ata5o.pdfIn PDF document text
    • http://naturebiolog.space/trig_sum_and_difference_identities_proofbzli9.pdfIn PDF document text
    • http://jobauthor.online/who_viewed_my_profile_whatsapp_pro_apkiz5k5.pdfIn PDF document text
    • http://rocketdocs.us/twilight_2013_full_movie_download_in_hindi_filmyzillajwuiz.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/29996293152h8nbb.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/44258924584.pdfIn PDF document text
    • http://stickerrus.ru/american_standard_gas_furnace_installation_manualuugbr.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/what_are_the_different_roles_in_scrum_process.pdfIn PDF document text
    • https://vumenaxusavow.weebly.com/uploads/1/3/4/6/134600171/1203228.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zevesijuduma.atwebpages.com/80212540780.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/is_an_ak_47_more_powerful_than_a_ar_15.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_off0000fcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAD 5432 bytes
SHA-256: da82a01214ec77a2003379e2d7f1133e3341894b9ecbf6f00de395f680fd2ddd
font_01_sfnt_off00010f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F16 10928 bytes
SHA-256: c1d46fd4f939e578e4f66573a4ac9aeeebf91328dfab0f7b26309d81de382ccd

Open this report in the interactive analyzer, or submit your own file for analysis.