Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea89ecdb33f99ddd…

MALICIOUS

PDF

91.0 KB Created: 2021-04-07 01:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd0e909780e3eb5e29710126ceae116d SHA-1: a0f882c84c29c94c901116f57a097906c153a094 SHA-256: ea89ecdb33f99dddde7c55e1bb36ad4663668889f5f47dfa99ff242af568c82b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to disposable hosting and are likely used to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the document's structure is designed to host many links on potentially untrusted domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wb?keyword=does%20wii%20have%20a%20hard%20drive
    • http://zaxevef.getenjoyment.net/power_system_reliability.pdf
    • http://autobuff.xyz/dobipofuw4hpum.pdf
    • http://persequen.com/nikejitekikgnuic.pdf
    • http://allrecipes.pro/how_do_you_play_the_djembe_drumpw9pi.pdf
    • http://joy-todays.online/2939505241541m82.pdf
    • http://golixudib.mypressonline.com/miligudojivapozodiser.pdf
    • https://cdn-cms.f-static.net/uploads/4390051/normal_602e4fac139a4.pdf
    • https://cdn-cms.f-static.net/uploads/4453556/normal_606005c6c1f3b.pdf
    • http://greatmasters.biz/85833695402s679w.pdf
    • https://cdn-cms.f-static.net/uploads/4476927/normal_601321a466f99.pdf
    • http://jenewazajasazu.getenjoyment.net/anamnesis_definicion_medica.pdf
    • http://handler-autoscout24.com/11060668964vi6a2.pdf
    • https://static.s123-cdn-static.com/uploads/4447880/normal_5fc590fea3ca4.pdf
    • http://lofitner.buzz/lojusokavoxujogebikivwbdc.pdf
    • http://gufutaca1.xyz/nibixuqdly6.pdf
    • http://rutinesuzufogat.mypressonline.com/50105065091.pdf
    • http://pakunobun.getenjoyment.net/car_parts_and_their_functions.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/voxipanovigepiv/philips_lighting_catalogue_2014.pdf
    • https://s3.amazonaws.com/debamijizozexo/silonosepito.pdf
    • https://s3.amazonaws.com/fedojigudaj/can_you_play_old_school_runescape_on_steam.pdf
    • https://f7690f66-1871-4559-97e0-239dee5b15da.filesusr.com/ugd/d2cc1f_b88fe9c4f86b4b3cada3a2371f064dde.pdf?index=true
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_7956cd6d5e2245eb831a3722dfb39537.pdf?index=true
    • https://s3.amazonaws.com/nasitevu/how_to_adjust_skmei_digital_watch.pdf
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_ed83269f1fce4830b80eaa35d8cbf645.pdf?index=true
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_88a378e7962241599de20b5b59535db4.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119da.bin
abff1ef72f65e7c4f8b476623e1b8ce0b10193f82a4f9f559aaf26955d68c70e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119DA 4632 bytes
font_01_sfnt_off000129b5.bin
e0fc57bc78d1a4d9990f9b975355a313545cd5b23b26fdc49a08f79964be18ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129B5 11520 bytes
font_02_sfnt_off00015081.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15081 4324 bytes

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