Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6dd0930bf1876f…

MALICIOUS

PDF

73.4 KB Created: 2021-03-17 22:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a6a04c1d17c2baa43904d1730c8acb92 SHA-1: 27a1f22553da03d952bb5e17887bf0b0ea5d512d SHA-256: 0c6dd0930bf1876f62ddfc7a2e502fd39b9ddf451555d285c11fc3783bd0cc4f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and the document body suggests a lure for 'Read 180 real book answers'. Heuristics indicate it's a link farm and ClamAV detected it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious or deceptive content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=read+180+real+book+answers PDF link annotation
    • http://xilatotes.sportsontheweb.net/nedulukovatonokolalovu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454435/normal_5fc87cc5b7f92.pdfIn PDF document text
    • http://fitness-ital.fun/beyond_531_spreadsheetijtkt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379221/normal_5ff4694c04227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_602c5d2db7ea1.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/hig1jiL/powokoz.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/historia_do_carnaval_no_brasil_wikipedia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462073/normal_5fe012b0999da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5fe6a725aaf99.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/ty2hege/letovosinipinavej.pdfIn PDF document text
    • http://3bki.ru/the_magicians_book_3_ending1lwy5.pdfIn PDF document text
    • http://xafawotilujos.mypressonline.com/gosofogapisof.pdfIn PDF document text
    • http://7evenrp.ru/garlopa_para_lijado_manualvu40w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vizulubafaxal.epizy.com/kingroot_apk_for_android.pdfIn PDF document text
    • http://susodiwur.epizy.com/82920113500.pdfIn PDF document text
    • http://sulijugofogim.onlinewebshop.net/what_does_the_word_hear_mean.pdfIn PDF document text
    • http://buzawasilugije.epizy.com/373875009.pdfIn PDF document text
    • http://pilazokole.rf.gd/philips_universal_remote_code_for_vizio_tv.pdfIn PDF document text
    • http://wififeju.atwebpages.com/pamewosuxudonisunez.pdfIn PDF document text
    • http://kebewuf.rf.gd/10139193065.pdfIn PDF document text
    • http://jibufunipibavu.rf.gd/free_bootstrap_template_for_admin_panel.pdfIn PDF document text
    • http://nivufebolira.epizy.com/bericht_schreiben_grundschule.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_off0000df70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF70 5508 bytes
SHA-256: f5d0337bdb9a4013374b6f79057101a5982f9d33d69cc35911e75919b2bb1780
font_01_sfnt_off0000f24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24F 10696 bytes
SHA-256: 70f9e7325cae836e77387fc1f3a4ce6551261206b9557494a9465f399c43a44d

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