Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bcf9f15fe732313…

MALICIOUS

PDF

80.7 KB Created: 2021-03-01 09:49:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8780480e81e1f5fe3c6013dc7a888d0e SHA-1: 4dac26e6bfcb2b6d157e0f568e22a118deaf67d9 SHA-256: 3bcf9f15fe7323136a66937dcfba378b40f1d7aa9c60e06accf005b8c96ff448
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 structured as link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. The document body, though partially corrupted, suggests a lure related to downloading a Bible, which is then used to redirect to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/aws?utm_term=como+descargar+la+biblia+catolica+latinoamericana+en+audio PDF link annotation
    • http://tidirakozodawon.getenjoyment.net/hard_crossfit_workouts_with_weights.pdfIn PDF document text
    • http://tamowigaxijatot.66ghz.com/59090322412.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/xisebonofugidema.pdfIn PDF document text
    • https://rosififobagas.weebly.com/uploads/1/3/1/1/131164218/5614236.pdfIn PDF document text
    • http://dasaburaxad.22web.org/tipos_de_anomalias_congenitas.pdfIn PDF document text
    • https://ruzunaxatan.weebly.com/uploads/1/3/4/3/134340268/tavozuruv-ruwowamogabadu-luvepojobupugak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://moletilezozosi.epizy.com/mezawenodutapefo.pdfIn PDF document text
    • http://zopefunexot.epizy.com/beyond_meat_earnings_report_forecast.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/score_hero_hacked_version_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/amharic_fiction_book_free.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/city_of_ann_arbor_zoning_codes.pdfIn PDF document text
    • http://xovolefewawex.atwebpages.com/who_makes_the_best_lawn_mower_battery.pdfIn PDF document text
    • http://fujifumava.epizy.com/futefikomuluvekujixurive.pdfIn PDF document text
    • http://zotinebid.epizy.com/elliptical_arch_formers.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/kenmore_gas_dryer_not_heating_all_the_time.pdfIn PDF document text
    • http://mumupaju.epizy.com/pikivavowajowitaz.pdfIn PDF document text
    • http://darajakejaxise.rf.gd/flashback_2_delay_review.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28E 5304 bytes
SHA-256: fb1b4fd3553f87e5417570bd0423fb70bd7288bfd60d2e7b20fb0150fee55597
font_01_sfnt_off0000f478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF478 12828 bytes
SHA-256: 58f85b5840a4ed2714d04d120a5b5f855989cb469b8deb47a863c3146a68a3a5
font_02_sfnt_off00011d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D90 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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