Malicious PDF — malware analysis report

Static analysis result for SHA-256 28a636c5379e4060…

MALICIOUS

PDF

102.7 KB Created: 2021-04-06 23:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 365a9a54276296abefa2cdf98fe80541 SHA-1: 510f3ea8df406e7909eae322eccc461fd2bca974 SHA-256: 28a636c5379e4060bbbde281554776f33d7ba060ac2ac9d41fb5016677f280d6
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with a high heuristic indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were extracted, the embedded URLs point to suspicious domains, indicating the document's primary purpose is to redirect users to potentially harmful content.

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
  • 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/wix?keyword=sol+republic+punk+speaker+manual PDF link annotation
    • http://idealica-tufficiale.website/carbolic_smoke_ball_case62fyv.pdfIn PDF document text
    • http://azules.ru/night_shift_cast_season_4_episode_10c23gg.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/b86Exjj/principles_ray_dalio.pdfIn PDF document text
    • http://cheapkeys.site/bomeseduzugigaso0n8k8.pdfIn PDF document text
    • http://aslixan.com/katya_elise_henry_workout_freeh4bel.pdfIn PDF document text
    • https://cdn.sqhk.co/dejijadu/phg0bia/descargar_musica_de_los_80_gratis_en_ingles.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxarufodir/cBUigge/61511533380.pdfIn PDF document text
    • https://cdn.sqhk.co/kapumikogux/oShVNEi/wa_police_beep_test.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wodowepakimeko.onlinewebshop.net/foxit_not_opening_in_internet_explorer.pdfIn PDF document text
    • https://4b002d3c-a55f-42ce-816c-238f848e88a9.filesusr.com/ugd/3398cc_3d72f28223554927b34ddc3cb93afd84.pdf?index=trueIn PDF document text
    • http://vawujularow.rf.gd/14th_finance_commission_guidelines_for_gram_panchayat.pdfIn PDF document text
    • https://ac0aa552-aaa7-40d2-95b8-1509c9da40b6.filesusr.com/ugd/7e0eb0_13337becc85c451daada8e44efd8843a.pdf?index=trueIn PDF document text
    • http://rewelopax.rf.gd/43963933435.pdfIn PDF document text
    • http://xedemigu.atwebpages.com/hush_little_baby_man_song_meaning.pdfIn PDF document text
    • http://dexixikix.epizy.com/radiology_residency_spreadsheet.pdfIn PDF document text
    • https://c4a0f302-b060-43a0-af10-a0364da5eca7.filesusr.com/ugd/c6d327_9a97cc80220545869430534406797c06.pdf?index=trueIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_68580d7231a84880bd54fb25bd25e3b3.pdf?index=trueIn PDF document text
    • http://kagijido.myartsonline.com/vuwesat.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_bfd354651a11465c94a61454b5270c71.pdf?index=trueIn 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_off00014ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EF0 5384 bytes
SHA-256: be75f6e63d6ecc107d0f571c32afaae23b6ef5b2737529401395fae807c79f3a
font_01_sfnt_off00016124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16124 12752 bytes
SHA-256: 8d1b2afcdb41a8d10765e7fbada408c0c9eca853d289b9ec200f6f423158cc8f

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