Malicious PDF — malware analysis report

Static analysis result for SHA-256 efdbb151ded94c26…

MALICIOUS

PDF

81.4 KB Created: 2021-05-02 13:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5f93d3f457bb06ea321eefce0afe0536 SHA-1: dabab199014e908b17955cfc567d14af7dc755dd SHA-256: efdbb151ded94c262134b2d07af994b1a66ab4a856505e0b09b53ee1e1dd65c4
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 0.9991

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://botokaw.ru/strik?utm_term=hp+4630+print+cartridge PDF link annotation
    • http://filemarker.store/78254258873ib4d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468259/normal_605022b92e705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_604f1e7b1b76b.pdfIn PDF document text
    • http://onlineeshop24.xyz/252458147813dqsw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457854/normal_60596a6e4d174.pdfIn PDF document text
    • https://siralukamowifi.weebly.com/uploads/1/3/1/4/131407299/jatiku.pdfIn PDF document text
    • https://jepejopik.weebly.com/uploads/1/3/4/6/134610321/kugumotozen.pdfIn PDF document text
    • http://wildber.store/what_is_the_role_of_a_pr_managercn7kj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_606cbe39ccc1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470533/normal_5fded05fb16aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_6014907e4496e.pdfIn PDF document text
    • https://kenumobubedu.weebly.com/uploads/1/3/4/3/134370592/5506764.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472206/normal_5fe53314216aa.pdfIn PDF document text
    • https://dafubadam.weebly.com/uploads/1/3/0/8/130874240/f5bda.pdfIn PDF document text
    • https://lexebovet.weebly.com/uploads/1/3/4/6/134628591/sisufuraj_vutefak_vixatidegi_wawipalonaz.pdfIn PDF document text
    • http://instas.site/61634768387qtk2b.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
    • https://63209029-b609-4f89-80e5-af59b408cdb4.filesusr.com/ugd/0713e6_edeae1bb60284fd5968cff83b877ae0d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/women_s_chunky_heel_platform_booties.pdfIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_57da99b6d8c84b739000d7485ae625e8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/levumoduf/bujuwipapebemowajezibum.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/47326441986.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/27810145351.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/98901347834.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_off0000f306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF306 5216 bytes
SHA-256: 2215483c31c27be6e30b881acaf6c7f2a6a557b01c0c40a29a134e3b008b351c
font_01_sfnt_off000104bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BB 10876 bytes
SHA-256: b654d1d3b72de8a7452ff816a097d022bbee003101208cf3730389baf6e43ff9
font_02_sfnt_off000129f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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