Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a014af6171a300…

MALICIOUS

PDF

78.3 KB Created: 2021-04-23 19:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d42afc5b358fbd1be0008d3fb7db5d2d SHA-1: d6d58626117e1e931a7cdc8941e0ab5ae5348f1f SHA-256: e8a014af6171a3003ad645e118f6fefac4acd187350b074415be60e945a3cb30
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, many of which are disguised as legitimate documents, indicating a likely SEO manipulation or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. No scripts were extracted, but the presence of numerous external URIs points to a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=matthew+5+17-20+esv
    • https://cdn.sqhk.co/podidiwi/jgxihqW/aws_beanstalk_and_cloudformation.pdf
    • https://cdn.sqhk.co/kigoxeni/Rhigdji/kivoze.pdf
    • https://cdn.sqhk.co/xekowodu/gcV8KCa/state_farm_equity_line_of_credit.pdf
    • http://torchqbfl.fun/adverbs_worksheet_circling_part_1_answer_keyf9qta.pdf
    • https://cdn.sqhk.co/sugefixa/gfIwkcX/75268489569.pdf
    • https://cdn.sqhk.co/wukomidekepu/bjjxvhj/emotional_abuse_definition.pdf
    • https://cdn.sqhk.co/sebazisop/idiaMjb/pixel_s_unknown_battle_ground_apk_uptodown.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • https://cdn.sqhk.co/pelopuxi/4jaQhgB/animal_crossing_pocket_camp_villagers_list.pdf
    • https://static.s123-cdn-static.com/uploads/4501770/normal_5fcb0f71f236b.pdf
    • https://cdn-cms.f-static.net/uploads/4491669/normal_603a8e54cdd05.pdf
    • https://cdn.sqhk.co/tufuboloruj/iehfUjd/competition_plus_tv.pdf
    • http://goodsun.fun/better_man_westlife_videobu7vr.pdf
    • https://cdn.sqhk.co/tubefajuvolu/hdXPSSB/situbakonuzeva.pdf
    • https://cdn.sqhk.co/jokufemij/bPjj0OH/wiselojepetolode.pdf
    • https://cdn-cms.f-static.net/uploads/4414488/normal_603e7887df9c0.pdf
    • https://cdn-cms.f-static.net/uploads/4412775/normal_606b72e7219e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_9cd6b7b7f684448c9e4703f3b2fa0f89.pdf?index=true
    • http://judotopefov.rf.gd/persistent_generalized_lymphadenopathy.pdf
    • https://2e21b658-2967-4279-8f18-a03590b678a5.filesusr.com/ugd/f5e1b2_05d65b3e41f34b86b1e20f08d0020a13.pdf?index=true
    • http://kadimadifunomox.rf.gd/human_anatomy_lab_manual.pdf
    • http://vepesupilet.epizy.com/basketball_diaries_jim_carroll.pdf
    • http://sarososibi.rf.gd/13038094088.pdf
    • http://sibubixusa.epizy.com/14210151442.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f185.bin
0431ac7e812aee2056c00ffee97bf57863717d3ca1b313174cca654f3cdc8f12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF185 5364 bytes
font_01_sfnt_off000103fe.bin
5e925d072ecdbe7964e5b90ad8fdccc0be6686eb4e570108db32f855464c8ebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103FE 11832 bytes

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