Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf5354a7c909490…

MALICIOUS

PDF

76.7 KB Created: 2021-04-08 09:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6e1dc45f97cf3bcaa824b0b8b3e392ed SHA-1: e785013388dc05d241e6f31b9ffc0409106e186b SHA-256: 7bf5354a7c909490eb81389e47965831b61bd209c2348c491e6658c3724420d9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one suspicious URL pointing to a potential phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

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://botokaw.ru/wix?keyword=van+dyke+trial+live+stream+cltv PDF link annotation
    • https://milanabez.weebly.com/uploads/1/3/2/6/132695465/3371581.pdfIn PDF document text
    • https://bematurom.weebly.com/uploads/1/3/4/8/134886193/0c29bd82.pdfIn PDF document text
    • http://idealsit.space/kidusaxirezavawavuzifix70ft8.pdfIn PDF document text
    • http://souve.me/767267220647iw3e.pdfIn PDF document text
    • http://wotedogupowu.sportsontheweb.net/85995552615.pdfIn PDF document text
    • http://ruzamaji.getenjoyment.net/dupematugejowabiweripo.pdfIn PDF document text
    • https://teraxumafelenug.weebly.com/uploads/1/3/4/7/134747654/4243983.pdfIn PDF document text
    • http://extra-fon.ru/52281185213f7td6.pdfIn PDF document text
    • http://wubowobipevoto.mywebcommunity.org/carpal_tunnel_syndrome_adalah.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_61cc166b164c4e4a80e7b0a5e4a3a0da.pdf?index=trueIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_a9ee255f03ae49b4a5cc1b7340f164bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lebaxa/remove_background_image_from_word_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/zodozusivafawawiwazumiga.pdfIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_cfea8a85c9304d86aea8061859776e98.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_06df62391dc248b789a024dcbf312e81.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/fitbit_versa_lite_2_features.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/ihss_electronic_timesheet_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28a53e5-9ef0-42fe-9fcb-1311bd7e12ca/navy_seal_mental_toughness_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90cb8151-718b-4cd6-be5b-57f76e5f0609/how_to_factory_reset_frigidaire_affinity_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff0c169-8302-4919-b988-f9ce4dde7307/lituvasixeva.pdfIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_824b2f91b62b44aba8e020e8b9e15683.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c524715e-8076-4937-b08c-96ead850da30/kofefimerer.pdfIn PDF document text
    • http://riledabetime.myartsonline.com/fijuvavomipapazipo.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/tedejigeteseve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21ae1a53-ec3e-4dda-a26b-847cb57547a7/vokabukogarijonupap.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_off0000f073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF073 5276 bytes
SHA-256: d1aabb61e3cadbbdb8325d9cd83592a5de5f340e2ab0588fe6471d3713bdbecd
font_01_sfnt_off00010268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10268 10284 bytes
SHA-256: 135363d46532c12f475d838f1abbbec6f095ac4545b514b27973e7b31f77836f

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