Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e87d0742b3a5e0…

MALICIOUS

PDF

91.6 KB Created: 2021-03-25 19:09:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bfc4ed97a07f0badc612bb3dc89439e SHA-1: 2067168905cafb0f57a7a82d4a08fa3d5d750ba7 SHA-256: b6e87d0742b3a5e07cbbbf12dac0cb8ef7d594a448ba9074b1f02f93c8ed72c1
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'xezojetit.ru', which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to a 'Moto g6 plus manual'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://xezojetit.ru/strik?utm_term=moto+g6+plus+manual+espa%25C3%25B1ol+pdf
    • https://cdn-cms.f-static.net/uploads/4486775/normal_6032ff88df120.pdf
    • https://cdn-cms.f-static.net/uploads/4450048/normal_6026942f5736a.pdf
    • https://cdn.sqhk.co/tixuniwe/vOiehe2/androidx_constraint_layout_import.pdf
    • http://meweremidef.iblogger.org/80212923513.pdf
    • http://vopibuxipem.22web.org/70085252619.pdf
    • http://zofozefevuf.iblogger.org/51427269701.pdf
    • https://static.s123-cdn-static.com/uploads/4466172/normal_5feb318025249.pdf
    • https://cdn.sqhk.co/zezovajav/r7Agjt3/sad_okay_meme_gif.pdf
    • http://wedudixunuluwef.iblogger.org/20790251859.pdf
    • https://cdn-cms.f-static.net/uploads/4410194/normal_600d4823b1b3a.pdf
    • https://cdn.sqhk.co/pulovafafita/tAicigs/fixing_a_toilet_that_runs_all_the_time.pdf
    • http://luwazesoj.22web.org/lajavapokagukigedotu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_abac102de8ad4c6c91185fd7d8acb97f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/33a6c50a-496f-46c4-ba82-829caa378e7a/how_much_is_a_liter_of_air.pdf
    • https://uploads.strikinglycdn.com/files/339eb9ca-93d4-4380-8bd0-6cea56976792/graco_milestone_all-in-one_car_seat_gotham_amazon.pdf
    • http://kanisisasulaba.rf.gd/26513305381.pdf
    • https://uploads.strikinglycdn.com/files/0a6d1147-d501-4a07-8a4c-1e6a5b958ea4/troy_bilt_horse_tiller_pto_attachments.pdf
    • http://nozovov.rf.gd/empyema_management_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/cbef06cf-3888-4a2e-adc4-057b84aedd68/cuantas_formas_de_ecuaciones_cuadraticas_hay.pdf
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_d9e38fecaeff48d7ae20702f623e38f0.pdf?index=true
    • http://retesatitogeli.epizy.com/ruvoni.pdf
    • http://tinegomawula.epizy.com/83257625782.pdf
    • https://0fecb50d-c8db-4b5c-a67e-01a13b1c0e9a.filesusr.com/ugd/da7c2d_4b53ba47ab4b4a528d7acac8631ced1d.pdf?index=true
    • https://33fe1336-4051-433c-b691-b763732126dd.filesusr.com/ugd/6c8f37_7340e322336e4cf384b3a3f19c31b135.pdf?index=true
    • https://uploads.strikinglycdn.com/files/344d4a37-b64b-4ff6-9782-752f073fdc38/85158157829.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010be7.bin
eff28ef48da05678030b90d705f6834cf87c76b12ea3946302068d33ff55f3ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE7 5636 bytes
font_01_sfnt_off00011ed0.bin
256dee6e1d30a10de6c56c442a4243bf9bdcd1c07cb40392bc67b83f6f5d8de5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED0 11892 bytes
font_02_sfnt_off000145c6.bin
bbefc643780d9a0abcd284c662b555747075330d56a553eb40eb0f5c4ccf8f50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145C6 17028 bytes

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