Malicious PDF — malware analysis report

Static analysis result for SHA-256 732c1fdc2b4a45ff…

MALICIOUS

PDF

77.8 KB Created: 2021-03-24 00:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e890ef66ef9b082518b9fd92d57d6678 SHA-1: 108d1b069ae2c331e7642bf54bd5c96555248bcd SHA-256: 732c1fdc2b4a45ff833929455aa78689f7214613ed93ab46466e3cd9f42ce8d0
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

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://jottigo.ru/strik?utm_term=how+did+anglo+saxons+bury+their+dead PDF link annotation
    • http://osummer.space/babedogomenawuvnof33.pdfIn PDF document text
    • http://tudovawo.22web.org/afterlight_2_apk_descargar.pdfIn PDF document text
    • http://cmbespaceclient.xyz/2530426419864oaa.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/gafokogiduwoxatafamorikm8li0.pdfIn PDF document text
    • http://monoga.space/whatsup_gold_for_pcf5yfm.pdfIn PDF document text
    • http://sufekuxuxujaw.iblogger.org/best_price_saeco_coffee_machines.pdfIn PDF document text
    • http://study-english-04.space/49830420410z7g4z.pdfIn PDF document text
    • http://xuwiropexij.iblogger.org/jipafunanikamoxexajojij.pdfIn PDF document text
    • http://presentinsta.online/betuzumijikufifudz9ky7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_6cd735aee66041d0ac81bbe84650328b.pdf?index=trueIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_d35a68c0c6054c79b5817516e2673424.pdf?index=trueIn PDF document text
    • http://dowirimidezifa.rf.gd/80540572723.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_6972ea4266fc42b88b7672b90fd29436.pdf?index=trueIn PDF document text
    • http://bobakazof.epizy.com/rosodivefafinotirozez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6bb517e-3dd5-4a94-8d20-b05fc07501cd/ver_la_ciudad_y_los_perros_pelicula_completa_online_repelis.pdfIn PDF document text
    • http://kolofagigetu.epizy.com/42343950734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f38a87d2-1d39-4243-90d0-3e1d44acc971/61560414973.pdfIn PDF document text
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_492cbb44c99a4b5e80d8aa96ef85bce0.pdf?index=trueIn PDF document text
    • http://bilodevufutumu.rf.gd/neurofibromatosis_tipos.pdfIn PDF document text
    • http://rujipezoj.epizy.com/gevudowidujawibeguzerape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4e08d1-26e4-4749-a8cc-df233141f744/rowom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54bcedc4-a7f1-4e64-8206-29eb2178a487/the_man_in_the_high_castle_ending_quora.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_off0000f154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 5448 bytes
SHA-256: da225a8933315908383ae95f158dc6e17b58ff265236d0e0f3ed996c816ce80b
font_01_sfnt_off000103ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EA 10556 bytes
SHA-256: 2d4c2350d9c5e15dbd7f00dc807d750806acdde151689a2706edf0972e5ac50f

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