Malicious PDF — malware analysis report

Static analysis result for SHA-256 109929ce1b7c29f8…

MALICIOUS

PDF

75.0 KB Created: 2021-04-27 14:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f5f4e6a80650d54c49956796073aa424 SHA-1: 28a3e2203dbf3b9bcb9ecf12b25873d607719431 SHA-256: 109929ce1b7c29f827c2eb91636737bd4b3685924bab27b5710e1defc14b005d
126 Risk Score

Malware Insights

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

This PDF document contains embedded URLs that lead to suspicious domains, including one that appears to be a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text suggesting a lure related to product searches.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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+is+the+best+10kg+washing+machine PDF link annotation
    • http://vuzuwul.getenjoyment.net/lincoln_sa_200_redface.pdfIn PDF document text
    • http://potozafit.medianewsonline.com/22_hebrew_letters_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/01yjagf/haki_soccer_stars.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/what_is_the_meaning_of_boolean_expression.pdfIn PDF document text
    • https://cdn.sqhk.co/xumifutave/M6ijhha/dirikiraz.pdfIn PDF document text
    • https://cdn.sqhk.co/tesigasefaxe/sFibrii/sausage_dog_running_speed.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/dad260bd-40ea-42c4-81c2-49c853fe1e4a/how_to_use_spirit_super_smash.pdfIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_59c6d50e31c740ecb7fb208f3ec27640.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec331ea-9ae3-4d26-98e2-9142a3c9642d/how_to_connect_ge_universal_remote_to_roku_tv.pdfIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_4554a4fd844e489e83e44c7467aa970e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/14916fee-8706-4183-a69e-a38d2e9a79f6/how_do_you_inflate_a_lay_z_spa.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/45518333830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40041f61-914b-4ef7-ba9b-98fe4feddc0e/jvc_kd-x320bts_bluetooth_delete.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_60dde29c083445cc86a5d525288ca18e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gifiz/coping_with_loneliness_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6559c260-1cb5-4370-b1d2-af67cdcbca95/67837207898.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_off0000e561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE561 5588 bytes
SHA-256: 6fd48fc3daf043a7de414e20eac7ad355b70a802acb4daf2d7d407c0de27bbad
font_01_sfnt_off0000f864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF864 10908 bytes
SHA-256: 1829119cdc19d00d5029c27498de069a819ffb5e22e1db403bf1ac276aaa5708

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