Malicious PDF — malware analysis report

Static analysis result for SHA-256 489757942c3be9df…

MALICIOUS

PDF

75.1 KB Created: 2021-03-13 18:28:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 9eeb2eda1cdb583cbad2962cd8107ce8 SHA-1: 460b7eaf85a72a1718113ca9baf69dba28941943 SHA-256: 489757942c3be9df3cbc513b99350e03a18f64bb4e4a918b964a742e987604b2
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily corrupted, appears to be a lure related to a common search query, suggesting a social engineering tactic to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=why+is+my+samsung+electric+oven+not+heating+up PDF link annotation
    • https://cdn.sqhk.co/kibutonap/COgjirs/mazibixebobuxadazagixa.pdfIn PDF document text
    • http://simultaneously.space/sunibegorentr.pdfIn PDF document text
    • http://storeeuro.info/english_dictionary_oxford_free7q43i.pdfIn PDF document text
    • http://hookup753.fun/940706524281jfoq.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/2iiTTia/funamadozikitebolipizipag.pdfIn PDF document text
    • http://pokinusuvato.getenjoyment.net/balanza_de_pagos_colombia_2020.pdfIn PDF document text
    • http://fruitslope.online/mojoxabadoyidk1.pdfIn PDF document text
    • http://bukuminuwakub.mypressonline.com/annotate_free_ios.pdfIn PDF document text
    • http://beautysss.site/polanyi_m._personal_knowledgewaex4.pdfIn PDF document text
    • http://tejowigasinafu.getenjoyment.net/32058466620.pdfIn PDF document text
    • https://jukewamozaf.weebly.com/uploads/1/3/1/4/131438013/2fbfea175512.pdfIn PDF document text
    • http://healthit.space/mackie_1604_vlz_pro_monitor_setupmibw2.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/Phegejc/21440681648.pdfIn PDF document text
    • https://cdn.sqhk.co/kupawusel/jgejiDu/kojutumagamile.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/mekogex.pdfIn PDF document text
    • http://feelslike35.com/virgin_pulse_store_discount_code6u1gf.pdfIn PDF document text
    • http://bit7.top/toyota_techstream_v14_keygen8ns08.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/2jebRhb/magic_magic_video_editor_mod.pdfIn PDF document text
    • https://pupokidam.weebly.com/uploads/1/3/1/3/131381904/be2804e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/chaos_child_platinum_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/bubojosulubovufoxutuku.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/crossword_answer_for_ostentatious_display.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/pevewekisusewa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE621 5520 bytes
SHA-256: 404245f78cb14dffee30fd2700b7a9b6678a0fd367597bae27577a614d82c49e
font_01_sfnt_off0000f8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DC 10616 bytes
SHA-256: 85018a051b9f3fedcbeb82281de8e4de613b12081e725e41533d50f6427a72bb

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