Malicious PDF — malware analysis report

Static analysis result for SHA-256 532b135e23cf0493…

MALICIOUS

PDF

78.1 KB Created: 2021-03-29 22:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9fd3b6c49e0b42ca6d33aa759e1dde3 SHA-1: c2de870d2218d5b74e7614a74972d64471b80ec9 SHA-256: 532b135e23cf04937b3eeb2948890e9a0a0149f347a1bed16c94d1ec44728853
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a site that appears to be a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to programming books, likely to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/award?keyword=java+programming+language+book+pdf
    • https://cdn.sqhk.co/buvaboda/0ihiRjf/solar_smash_unblocked_66.pdf
    • https://cdn.sqhk.co/zabitokepum/jxWs7gg/jisijowade.pdf
    • http://nubemeketetu.mypressonline.com/wodunabokesizemu.pdf
    • https://cdn.sqhk.co/fedovipawe/jhgilhd/cosmic_showdown_servers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tuxefofoxomar.epizy.com/andrea_camilleri_books.pdf
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_7d53faf9413840afa33f7c8f55a9c159.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e208ba77-ca86-4763-b29c-5fa0e619385b/70271344667.pdf
    • https://s3.amazonaws.com/fizup/free_film_baahubali_2_subtitle_indonesia.pdf
    • https://uploads.strikinglycdn.com/files/279f9a44-3c06-4fe7-986c-0a614c5dc640/what_is_another_word_for_least.pdf
    • http://bejiteviv.epizy.com/samsung_tv_allshare_cast_android.pdf
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_1af2ff90b265484ab132ded709a2164c.pdf?index=true
    • http://zutilafuje.epizy.com/jafesite.pdf
    • http://lawesiwewif.onlinewebshop.net/ninety-five_theses_world_history_definition.pdf
    • https://a1b876fd-e98f-4594-996d-fc523792ae9e.filesusr.com/ugd/efcbf0_26a043b6c2f644409cce0f7bf67834c6.pdf?index=true
    • https://s3.amazonaws.com/vebogotexaf/image_slideshow_powerpoint_template.pdf
    • https://s3.amazonaws.com/vibuvomomuv/mitaxipozebafewudeji.pdf
    • http://wonenuw.epizy.com/malayalam_hindu_devotional_songs.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_off0000f2e0.bin
9b8268596fca0b8ea7e3775b7c56e28d72b1d4c01c78093a0b045a8ca0c407d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E0 5436 bytes
font_01_sfnt_off0001055b.bin
23b56a8faef87808f2f391773e7aca38715a5da78a12221f09ea974f3090eaf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1055B 11240 bytes

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