Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3800a388dba0fe…

MALICIOUS

PDF

91.2 KB Created: 2021-03-24 04:03:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 200522e9ab0874df976f6b3189355162 SHA-1: 5964c76b88641c0702c123478e0484b3ff2cef4d SHA-256: ae3800a388dba0fe2a588e16d5282f3c638bb7d04e262854a44ac4108f1b3d23
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 0.9997

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://jumiwimov.ru/123?utm_term=birthday+cake+boy+images PDF link annotation
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/gusuloju-letuga.pdfIn PDF document text
    • http://kzrovk.xyz/97264053210kvn3v.pdfIn PDF document text
    • https://wisenuru.weebly.com/uploads/1/3/1/8/131856959/5625208.pdfIn PDF document text
    • https://wuzikixow.weebly.com/uploads/1/3/0/7/130775075/8529841.pdfIn PDF document text
    • http://eroganoficial.site/r12_to_r134_conversion_kit_autozone86xct.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481285/normal_5fcd888d90574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_600ad6d24f7ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_6052a708c312c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420743/normal_6030190aede7b.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/97472487493mizqx.pdfIn PDF document text
    • http://card2card-perevod24.site/75779699550oxdf4.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/92a86718-17d0-46e6-97dd-b5a9c1ec8cf7/imdb_harry_potter_half_blood_prince_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b01b26dc-fbed-4f87-a32d-afdd2f8437ac/canon_rebel_xti_400d_memory_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0759e63a-8ad0-40e1-a0da-6a144b68ba8e/more_scary_stories_to_tell_in_the_dark_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf5d592-fab7-489f-90bb-b2cf00658f34/posipujoroxuvopizi.pdfIn PDF document text
    • https://87deab66-c645-46c6-955a-dbc2758d34a6.filesusr.com/ugd/302fc9_546e67ecc3804ec286bcc949d08e5f94.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e971c85-ea4e-4ba3-b422-574be2aa08b8/do_disney_employees_get_free_parking.pdfIn PDF document text
    • https://b2fc43c4-60ab-4dc1-a1c8-84833fda4e2a.filesusr.com/ugd/37321e_a8dad39314f940e6bbba409c2848faaf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D9 5676 bytes
SHA-256: a7a626d5441c48f3f4dcaf9bc5a355b8d2dd63fde14d0cc3d2a4496517052257
font_01_sfnt_off00012709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12709 10176 bytes
SHA-256: 31ba78a615ab6abb1e1413ff742ed647261237b249df222a38bc5587603173b0
font_02_sfnt_off00014a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A21 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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