Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9123cb81ff7a070…

MALICIOUS

PDF

104.2 KB Created: 2021-04-02 15:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: dd8614bdf22f4217e6e9d69cb3d25a5a SHA-1: ba3f25931f98017e143a99328140f06be869259e SHA-256: e9123cb81ff7a07026b8f0d7706b99a1498a644a06cc139c80d1f1ab6007cff0
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded content, though obfuscated, appears to be a lure related to an NFL injury report, likely intended to trick users into visiting malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://lozipotod.ru/123?utm_term=nfl+injury+report+week+6+2019 PDF link annotation
    • https://nagugopusoz.weebly.com/uploads/1/3/4/6/134645600/xebopum.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/ghijjhj/steam_tools_mobile_app_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/rowagana/esgghdm/mifur.pdfIn PDF document text
    • http://oneshops.space/165265554509lbt2.pdfIn PDF document text
    • http://rixuliketasaban.mywebcommunity.org/cours_d_anglais_pour_dbutant_gratuit_en.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/eFjg8qD/nagomexedujisurusuniwa.pdfIn PDF document text
    • http://bottlechainworld.com/fluke_771_spare_parts8xisx.pdfIn PDF document text
    • https://wawurekufa.weebly.com/uploads/1/3/4/3/134322490/kifozulejupaz-raboteli.pdfIn PDF document text
    • http://apsdd54gfv.xyz/web_browser_crypto_miningkqx2k.pdfIn PDF document text
    • http://pifemukopisare.sportsontheweb.net/how_to_put_a_samsung_refrigerator_into_forced_defrost.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wadoromutisagar.myartsonline.com/cantos_ezra_pound.pdfIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_dd9d9ab779aa424ea4412cce37d79cec.pdf?index=trueIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_428568c21b5a4c5788d007eb650079e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pidufozu/beery_vmi_full_form.pdfIn PDF document text
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_44f28836dfc140928935799415074582.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/20367773757.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/arduino_driver_software.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14798 5328 bytes
SHA-256: ad7d3ec17bd42564aa4fb7abbc90c29721cb705b0f1a611e3f862fda6d6cc290
font_01_sfnt_off000159ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159EE 12548 bytes
SHA-256: a6da8fe251e469189ca59794c60100d3b2dc3f3e570188b631960f0de3b60ff1
font_02_sfnt_off00018415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18415 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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