Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc4561700051f79…

MALICIOUS

PDF

81.0 KB Created: 2021-04-02 00:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a7e96f0b18627e00227b8678c984f10 SHA-1: 23f44c5dc3fc7548fb75cda72a7215584bb3f5a1 SHA-256: dbc4561700051f7963bd34b61649dc80974c206c63009ea1db81371a0335c9ca
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a phishing or scam attempt. The embedded URLs, such as 'https://dugedepap.ru/award?keyword=queen+gambit+pdf+books', are designed to mimic search results, likely to trick users into visiting malicious sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/award?keyword=queen+gambit+pdf+books
    • http://ziwusis.getenjoyment.net/nuzuvoratunit.pdf
    • http://vowuzemiru.medianewsonline.com/abrsm_jazz_piano_pieces_grade_1.pdf
    • https://cdn.sqhk.co/jotapepikota/5xTojhc/fetokafipufovijifupatix.pdf
    • https://cdn.sqhk.co/pozazoji/CifggfP/angielski_zestawienie_czasw.pdf
    • http://xafawotilujos.mypressonline.com/janijosodeful.pdf
    • http://zopokujejisolan.getenjoyment.net/precipitation_theory_of_calculus_formation.pdf
    • https://jubekajaduv.weebly.com/uploads/1/3/4/3/134345699/kokobitenibafevon.pdf
    • https://cdn.sqhk.co/lupejatuwi/SKgiSge/walotopezuxan.pdf
    • https://fajizaxaro.weebly.com/uploads/1/3/1/3/131381717/473b43a2d52.pdf
    • https://mewifukemi.weebly.com/uploads/1/3/4/7/134764424/suximorebaxew_baxiwe.pdf
    • https://wukarogokemek.weebly.com/uploads/1/3/0/7/130739107/suziw-fozizivivofuwen-gokapurebo-varesulodawo.pdf
    • http://desajegurake.scienceontheweb.net/when_to_perform_causal_analysis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/25dd8dea-9330-48e8-ba97-28f930903769/jilasakesej.pdf
    • https://uploads.strikinglycdn.com/files/c0a5d38c-b5a2-4e16-a9ab-7dafcc0416e7/70777199130.pdf
    • https://79e5ec13-148a-49e7-9308-7b7844992bd9.filesusr.com/ugd/1d149b_4107c370b138453eb82575ea4f853af2.pdf?index=true
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_407355c7ab044384a5aa7b9e95359271.pdf?index=true
    • http://reladefuxuna.onlinewebshop.net/cateterismo_vesical_de_alivio_e_demora.pdf
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_d41cab073c81446289da92d34d80c293.pdf?index=true
    • https://63a0a607-6d1b-4b95-a813-f1b07cabc719.filesusr.com/ugd/ad56f2_08645e695ebc40bb913aee421429dc10.pdf?index=true
    • http://dasobiviwadodaj.atwebpages.com/white_fang_movie_2020.pdf
    • https://fb8ab7fd-b1ba-4cfe-bf4e-0019a60aedc8.filesusr.com/ugd/cac9e4_4a9ce2882b51483bb9df75d628bc5ce1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e88e2572-f38e-4f28-aff1-ef7b25aa3f7e/fakeg.pdf
    • http://bepolujogox.atwebpages.com/holmes_lifelong_tower_air_purifier_with_hepa_hap1201-tu.pdf
    • https://uploads.strikinglycdn.com/files/546ef2ed-088f-4716-83a0-1c419ac15d69/how_much_oil_does_yamaha_kodiak_400_take.pdf
    • https://uploads.strikinglycdn.com/files/da4153fc-d7a6-460a-aaee-0a2f27cc452f/fimerakim.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2b.bin
85b9a03fe6770c3a4f5b9fa9d74f8fcad4e86dd505df398219ef9c25421daaa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2B 5496 bytes
font_01_sfnt_off00010ed2.bin
372fd88fe802f289d45ca06ba600b58ac9d0940a3aab32197988a751a208dd36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED2 11648 bytes

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