Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62e459942004cf9…

MALICIOUS

PDF

86.1 KB Created: 2021-04-28 18:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2cc8a5e0224289177e0837b242f1f6b3 SHA-1: 723afef0fd010890f1f3d44f8282c18865f09341 SHA-256: b62e459942004cf98d8aea834f6543019d31702e9d96416a86d2f1cefc01f131
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 0.9996

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://gimoguvi.ru/strik?utm_term=how+to+make+a+deep+house+track+fl+studio PDF link annotation
    • http://tiwimifozukimu.medianewsonline.com/10732605340.pdfIn PDF document text
    • http://fosonelotila.medianewsonline.com/ronim.pdfIn PDF document text
    • http://soldonlittleton.com/xubumilupuvelvvp7g.pdfIn PDF document text
    • http://megivisu.22web.org/72147987333.pdfIn PDF document text
    • http://sallehub.xyz/jizidezjr2oa.pdfIn PDF document text
    • http://lighterusb24.site/506503580125bsz2.pdfIn PDF document text
    • http://buliwomof.22web.org/free_wedding_invitation_templates_word_2007.pdfIn PDF document text
    • http://technodom11.com/32490887506pksyf.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://uploads.strikinglycdn.com/files/9a707f87-1180-4057-9baa-6876185dd105/53208115668.pdfIn PDF document text
    • http://ritekarevo.rf.gd/refagamidutudu.pdfIn PDF document text
    • http://manisamat.epizy.com/nccn_guidelines_thyroid_cancer_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa7af4d-3052-43ed-a005-3b51c40a9cd9/60357703706.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/jizogusige.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/16661154829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3833d6fb-d51e-4288-8745-ebaa7c3fb237/xopipimifazabubi.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/build_my_life_lyrics.pdfIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_21a2e78e0d7d4c90be2f6dd81b2efa1d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/definicion_de_demografia.pdfIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_34fbd5964beb45e9857bd4ac5e7a2535.pdf?index=trueIn PDF document text
    • http://kezatafoxab.epizy.com/82898133975.pdfIn PDF document text
    • https://746420f6-3007-491b-ba72-fd43be5094e5.filesusr.com/ugd/277b62_f466b84dc8c04821954503b80f46c113.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A5 5288 bytes
SHA-256: b8633a552f872c2d50ca1797deacfaff56a9c8dfbb77f1698c7b2f4fca19058e
font_01_sfnt_off000114ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AD 11144 bytes
SHA-256: ccce8119844809d84fc5b9ec38e0e9686c474043daf596b4e45f240a7ee69fa4
font_02_sfnt_off00013aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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