Malicious PDF — malware analysis report

Static analysis result for SHA-256 f33a7200dc5420b8…

MALICIOUS

PDF

80.6 KB Created: 2021-04-04 02:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 92cb83ee488fbbdd49605f7d036f7cdb SHA-1: 2105384b525c471c94a7758e1c8b39401facba4b SHA-256: f33a7200dc5420b8b6f5e691f047fb7ebda3a66d770f93e854d85dbc50f6970d
126 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it is a link farm designed to redirect users to external URLs, specifically one related to car maintenance queries. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URL points to a suspicious domain, further supporting the phishing attack pattern.

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/strik?utm_term=what+type+of+oil+for+2012+lexus+rx+350 PDF link annotation
    • https://cdn.sqhk.co/juvanejejuwo/a0NXSi0/92402386483.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/divina_commedia_libro_scolasticoi7wxn.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/jfHjeji/sidagoluvaroziwavel.pdfIn PDF document text
    • http://oneitshop.info/samsung_pay_money_customer_care_numberom449.pdfIn PDF document text
    • https://cdn.sqhk.co/surofowudula/GgcioJ5/kexakusewoduvenojefatalef.pdfIn PDF document text
    • http://legugoboxebepe.22web.org/pakubuwutirudulajupumu.pdfIn PDF document text
    • http://smartline58.ru/bejuvuguzevaty7wd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/70b1cd52-c394-4fe9-9050-e1419958edae/93444266540.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/79735368588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6556e43e-0921-4df8-ae0a-ead4224a48fa/30109043693.pdfIn PDF document text
    • http://jomedive.epizy.com/mamalitaxugamepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f8e224-89c6-4a00-885e-0bc210f74e8f/les_mis_movie_musical.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/bike_race_english_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7cbeaea-ed32-4967-8312-3044478aca80/manual_de_instalar_da_impressora_hp_officejet_4500_desktop_no_notebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b6ab78-79d4-4d22-8599-e78f2ed52c6f/jafafatekifawelat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ac2296-f171-4523-94d3-c4f0da483510/91954040037.pdfIn PDF document text
    • http://bijupota.epizy.com/arris_dg860a_login.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/32917112045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/048bde3d-123a-404e-ad6a-2a2e2d26d10d/27839731719.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_off0000fd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD21 5788 bytes
SHA-256: 67b9fe31efef5798e6e2e25d5735142aaf6efcaa2aaef3b5c60afefdad884ab6
font_01_sfnt_off000110ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EC 10508 bytes
SHA-256: 59e6ba2e9293db064a7d3bdf9f22c46cabe38c65e213d6c63470c69dddbec833

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