Malicious PDF — malware analysis report

Static analysis result for SHA-256 f196386554805d61…

MALICIOUS

PDF

77.1 KB Created: 2021-03-25 09:58:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: efa9d9dbfca93fe9e5bce58a08d1e4cd SHA-1: 914051705a954b38844b872acac8ee5d3ffbb272 SHA-256: f196386554805d61eb2523f96f0c59c87f101368e46c67c5ba5ffa86d9a3b159
156 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 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 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.
  • 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://jumiwimov.ru/wix?keyword=zaycev.net+apk+%25D0%25B2%25D1%2581%25D0%25B5+%25D0%25B2%25D0%25B5%25D1%2580%25D1%2581%25D0%25B8%25D0%25B8 PDF link annotation
    • http://bovewitavivebu.getenjoyment.net/87790552774.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/sixolutajonozutem.pdfIn PDF document text
    • http://rikuximuvo.iblogger.org/kupifuruxepoju.pdfIn PDF document text
    • http://tekufebuxu.iblogger.org/fulolemalibimelomu.pdfIn PDF document text
    • http://kotexob.iblogger.org/rimosavelo.pdfIn PDF document text
    • http://gajozemexip.22web.org/lista_de_alimentos_con_fibra_soluble.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/lozetelavagap.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/skilsaw_hd77m_power_cord.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vadawowugozopul.epizy.com/79569026837.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/lutovali.pdfIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_b7a0f374ab814d6389a4d11b51c2f066.pdf?index=trueIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_7ce6e46b38ce4edd95e5a983447d502e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libeganot/at_last_sheet_music_violin.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/aventail_access_manager_sonicwall.pdfIn PDF document text
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_688da81c753e4b1585afc868087a94fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/muwoperoguza.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/probability_plotting_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/how_do_i_use_my_jvc_everio_camcorder_as_a_webcam.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/fuel_ratio_for_outboard_motor.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/sh_digraph_worksheets.pdfIn PDF document text
    • https://4e16d9da-0927-4957-8a4e-4544605d6055.filesusr.com/ugd/d7e550_a26234506b854ced91b448356637211e.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_off0000e30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30B 5424 bytes
SHA-256: da51f2256c73c9b499f46ca276e48a7f2f95dd03fa6c4419f213474a18b18e93
font_01_sfnt_off0000f4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AF 15568 bytes
SHA-256: f8f441d385cbecc402c2433e9db03f142e580fcd41f7d4bf923df40015de2ab4

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