Malicious PDF — malware analysis report

Static analysis result for SHA-256 0930c5d36053e51c…

MALICIOUS

PDF

75.2 KB Created: 2021-03-09 06:26:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: b8daf165a9e6e26fb7193f8274b79610 SHA-1: b5ff22a2aaf41c71e22ef38de8a146e60237cf33 SHA-256: 0930c5d36053e51ccd081f0f00c9f2bcf98eed0b35f99548eb3a4bf67d56933b
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('seumenha.ru') that is likely part of a phishing or malware distribution scheme. The PDF structure and embedded content suggest it is designed to trick users into visiting this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://seumenha.ru/award?keyword=atto+di+dolore+per+bambini+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425784/normal_600ca12aeacff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487386/normal_601b294311643.pdfIn PDF document text
    • http://parawabasufubep.iblogger.org/will_there_be_a_third_fantastic_beasts_book.pdfIn PDF document text
    • http://beliyden.xyz/minadafofotea4chj.pdfIn PDF document text
    • http://torarofuzavu.22web.org/73031401481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_600e2f46e4140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460680/normal_5fd7d6e2e359d.pdfIn PDF document text
    • http://zurabutodiriwa.22web.org/33151431278.pdfIn PDF document text
    • http://strahauto.website/grim_reaper_pepper_scovilleciaeu.pdfIn PDF document text
    • http://kisegojunu.22web.org/how_to_make_realistic_drawings_on_procreate.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445130/normal_5fc8d5f77cb5f.pdfIn PDF document text
    • http://kutifelafal.iblogger.org/20421775946.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/lulelepese/billy_ocean_suddenly_song.pdfIn PDF document text
    • http://kutifakibidi.rf.gd/35786115675.pdfIn PDF document text
    • http://bajokekez.epizy.com/appserv_free_for_windows_7.pdfIn PDF document text
    • http://minofadejewezup.rf.gd/katibolono.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/96192787901.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/rimworld_ice_sheet_survival.pdfIn PDF document text
    • http://xijuroluzuka.epizy.com/what_does_a_restaurant_operations_manager_do.pdfIn PDF document text
    • http://sidiwen.epizy.com/56441373458.pdfIn PDF document text
    • http://nexizali.epizy.com/attack_on_titan_characters_names_all.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_off0000e994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE994 5140 bytes
SHA-256: 8d28a330c0abb6592eae1ce06e53d9d670bc6ff5861443ff216128c5a0eb30c2
font_01_sfnt_off0000faf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF1 10876 bytes
SHA-256: fdf343f40f2de3db44074b40b8fc3d5ea96d1d63e0ca2936c4da3520d4eef6ac

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