Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf4eabeba374a939…

MALICIOUS

PDF

75.6 KB Created: 2021-04-28 23:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d8559e8ca4894f72271a77f448002532 SHA-1: 589b3ee0ca1e21ba07ad9e306e62be130369f236 SHA-256: bf4eabeba374a939e9708f7054390676432d132bc760be661e1fc59d140098e7
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/strik?utm_term=super+mario+3d+land+1-2+secret+exit PDF link annotation
    • https://cdn.sqhk.co/tirinakiweda/ajhehft/sacrifices_lyrics_fabolous.pdfIn PDF document text
    • https://cdn.sqhk.co/vilosezuj/h4jjpHM/bomber_jacket_leather_couch.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/34hihhQ/received_pronunciation_colonies.pdfIn PDF document text
    • https://cdn.sqhk.co/minederepa/jZ5ighf/car_driving_simulator_mod_apk.pdfIn PDF document text
    • http://vofidiporalives.22web.org/40437254399.pdfIn PDF document text
    • http://vedibekupuviru.iblogger.org/wejabinavakorekamexa.pdfIn PDF document text
    • http://xopijodujakik.22web.org/89437585936.pdfIn PDF document text
    • http://003-center.ru/why_does_katniss_wear_the_mockingjay_pinbjkpk.pdfIn PDF document text
    • https://cdn.sqhk.co/juvowisire/jjiZ11H/digetalixidajuzixilowi.pdfIn PDF document text
    • http://copyrightram.net/wererusupopopizuxejafa2er.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/ND5ERhc/personal_sticker_maker_wastickerapps_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xizoxenefodage.epizy.com/business_major_field_test_study_guide.pdfIn PDF document text
    • http://gapogup.epizy.com/50043778024.pdfIn PDF document text
    • http://gimanumaju.epizy.com/12770500590.pdfIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_06adaa43db6a47089e40e91c3899c20e.pdf?index=trueIn PDF document text
    • https://83bd47e3-138d-48d8-8d00-514fe13b91b0.filesusr.com/ugd/c87a2f_8960b19ebf4142b08546762cef9d2dec.pdf?index=trueIn PDF document text
    • http://remakirobiwux.epizy.com/analog_and_digital_electronics_lab_viva_questions_and_answers.pdfIn PDF document text
    • http://mopezit.epizy.com/naledovawutadipinejowe.pdfIn PDF document text
    • http://mogadaf.epizy.com/default_binding_mode_xamarin_forms.pdfIn PDF document text
    • https://d0aee4dd-c5bf-4c29-adcf-3aa844f59ef3.filesusr.com/ugd/193d13_a29659047b784b21b941ad8b76fdc613.pdf?index=trueIn PDF document text
    • https://780c8f77-0f51-49ab-8dd1-60a90eb210a4.filesusr.com/ugd/1b8612_5e6d78a2184c43dc8720db2d1006d760.pdf?index=trueIn 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_off0000e784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE784 5768 bytes
SHA-256: f374eddf601aaaaa56ce9f2993a6fc96026963602b5ac93890865955b65c79f8
font_01_sfnt_off0000fb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB21 10596 bytes
SHA-256: ba4215fdbb1774516b03286fe9677ddf11bffa51123bfd20182a61660d35f485

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