Malicious PDF — malware analysis report

Static analysis result for SHA-256 982b71470e3fe46f…

MALICIOUS

PDF

70.2 KB Created: 2021-03-12 17:38:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 93654721598fb7c3f72f5c4013824c30 SHA-1: 5a69c952f44e2cbfb73e830a3276b2329de3116a SHA-256: 982b71470e3fe46f2f300987696862f5ea8c5afc3fc384d5c537d76f2d3c8f79
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=fazon+uhc+plugin PDF link annotation
    • https://cdn.sqhk.co/jupozaregu/hr01rjj/pixitizasusefejavozek.pdfIn PDF document text
    • https://xajerunufunofe.weebly.com/uploads/1/3/1/3/131378991/dabuzulotixazaxo.pdfIn PDF document text
    • http://vejenov.iblogger.org/is_percy_in_the_tyrants_tomb.pdfIn PDF document text
    • https://vepimogarib.weebly.com/uploads/1/3/4/8/134856589/zewepominenu.pdfIn PDF document text
    • http://presalon.xyz/706224749528a39q.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/shfzTic/3568989998.pdfIn PDF document text
    • http://immorta-cross1.club/saragosoxexozafojozufajalvzhrg.pdfIn PDF document text
    • https://bukodagunotul.weebly.com/uploads/1/3/4/0/134012399/2545076.pdfIn PDF document text
    • http://ruwaxidalemib.iblogger.org/17198209881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416805/normal_6017bfe6a2165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472484/normal_5fd1c00ee1c9a.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/3550513.pdfIn PDF document text
    • http://detonic-deutschland.website/microsoft_office_2010_tutorial_free_download_32-bitbrjfa.pdfIn PDF document text
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/danugino-viweju.pdfIn PDF document text
    • http://emmetrix.net/tojudilefibuxqb11.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/8d5ba33d-8789-4d9e-9cca-aa56656b2ee0/is_shell_v_power_gas_ethanol_free.pdfIn PDF document text
    • http://vopepogam.rf.gd/reneda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14765f8b-1f25-42f0-9a85-bec3c0b3ee15/zodebame.pdfIn PDF document text
    • http://bekovomojuto.epizy.com/supikowuxivixamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5a3dde8-76ac-4c33-8b11-944024d59f7b/g_shock_g-7900a-4dr.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_off0000d84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84A 4924 bytes
SHA-256: c48257559234f7f5ca6980cf7e502a447c12df20c483a3c75d603b1ed011223f
font_01_sfnt_off0000e91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91D 10244 bytes
SHA-256: fe74240db09fbdcffed095c30976062a8a9e87dd89dbf4710b343a0e31cc202d

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