Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0aed2183d22824d…

MALICIOUS

PDF

88.8 KB Created: 2021-02-19 08:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 82ac9aa1a295def14024eeed335ee1e6 SHA-1: be60f29d1839b8bd3dac74d916c31887816e157c SHA-256: a0aed2183d22824d0cc702994bf2276ff209639c803128e33863725d637e00af
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malicious redirection attempt. The presence of a URL with a search query as a parameter suggests a lure to trick users into clicking. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=how+much+does+it+cost+to+replace+the+screen+on+an+ipod+touch+5 PDF link annotation
    • https://cdn.sqhk.co/xokekekav/hXlIji7/gutaforejolidubezunozo.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/vgi3xgi/physics_class_9_sound_ncert_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/bujutinape/hs1Tg35/44940269821.pdfIn PDF document text
    • http://ramosek.iblogger.org/10_inch_android_tablet_argos.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/Wic5Ohb/dolise.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/9idjbjj/ghost_rider_bike_wallpapers_wallpaper_cave.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/WSFidih/51991477525.pdfIn PDF document text
    • https://cdn.sqhk.co/naxusepimosa/ds8c4hj/183405260.pdfIn PDF document text
    • http://masuxolujetub.22web.org/alibaba_chalis_chor_picture.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/idlhfia/navipiji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dumizalu.epizy.com/sda_sabbath_school_teacher_s_guide.pdfIn PDF document text
    • http://reditavipesef.rf.gd/bojte_se_tmy.pdfIn PDF document text
    • http://lupijatewesonev.rf.gd/1001_albums_to_hear_before_you_die_2018_list.pdfIn PDF document text
    • http://kudukel.epizy.com/84744392822.pdfIn PDF document text
    • http://tudalumovadir.epizy.com/vinujiwiwoxedaret.pdfIn PDF document text
    • http://judomoposigu.rf.gd/bwv_1004_sheet_music.pdfIn PDF document text
    • http://tolimimagag.epizy.com/windows_10_pro_brightness_driver.pdfIn PDF document text
    • http://gudodatu.rf.gd/71794363821.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8B 5372 bytes
SHA-256: 82bd9dad1702a8914ef4736b5e2ff60bc3219f04385f24edca2a416c049e6043
font_01_sfnt_off000121b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B4 11104 bytes
SHA-256: 9e913443d021e2e7106d50a968f35e86b217c2588874114336b9da128a931bba
font_02_sfnt_off00014739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14739 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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