Malicious PDF — malware analysis report

Static analysis result for SHA-256 9daf383ec79ebd5e…

MALICIOUS

PDF

88.9 KB Created: 2021-05-06 22:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fe235818b575fa5c8b2c30b5de5feb1a SHA-1: 74e5ded79ade8df60b797dfad5b2447f16b7741b SHA-256: 9daf383ec79ebd5ed61a5a4a4ecfebf3da0851838cc147028510e2c7e4ceba1d
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 0.9993

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://xajibur.ru/strik?utm_term=jocko+willink+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375889/normal_6027561b4936c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412173/normal_5ff7fee54fb3d.pdfIn PDF document text
    • https://vujojetusifej.weebly.com/uploads/1/3/1/3/131398487/remina_wexakoz_vobemibevelebi_vevofav.pdfIn PDF document text
    • https://savozajit.weebly.com/uploads/1/3/5/3/135320594/9d2684ab91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420431/normal_5fc69586d87cc.pdfIn PDF document text
    • http://specialsale.info/tutorialspoint_sqlite_cp3hvl.pdfIn PDF document text
    • http://wimazosuwoxugij.66ghz.com/vajanuzajevuzurum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414682/normal_6043780391823.pdfIn PDF document text
    • http://dilurijarejo.22web.org/12955964393.pdfIn PDF document text
    • http://wei-nmvc.com/dofotizik53fkj.pdfIn PDF document text
    • http://vehicleusains.com/683983449857s3l.pdfIn PDF document text
    • http://jadebey-x.com/commuters_sans_extra_bold_free_downloadob2bx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_602feee3740a1.pdfIn PDF document text
    • http://zawugexoj.22web.org/muvopufakivo.pdfIn PDF document text
    • http://hayatevesigar.online/575769963986bctv.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/257ae4ef-e395-4c3c-a739-b3963c2f8c47/72333334050.pdfIn PDF document text
    • https://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_76e35696cdba4519b112cf13b7ec7486.pdf?index=trueIn PDF document text
    • http://lazevemu.epizy.com/jusigilewabiguserorewi.pdfIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_c44c12e185494f1fac2fecf5ecdf8f89.pdf?index=trueIn PDF document text
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_6c7a0b0a45284343a2c2491ecc1b5b06.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7086e175-9778-4d4c-abd1-8b3ff42d26cb/what_is_hardware_software_integration_testing.pdfIn PDF document text
    • http://sipomivizipe.epizy.com/71564609698.pdfIn PDF document text
    • https://94cb5446-44f7-499c-8ddd-8d9df3a2db3d.filesusr.com/ugd/9b9c26_744d1baf1c3b45f2b2587bf2ecb3d210.pdf?index=trueIn 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_off000120b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B5 4612 bytes
SHA-256: 894a81e575fd492a9b63720bf82600ded85086554d724488dfca66adcdea8b55
font_01_sfnt_off00013090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13090 11256 bytes
SHA-256: 8586a791549222a942ae57bbcf4162d71ed03e1a7778bf15ffc549282f7c39a4

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