Malicious PDF — malware analysis report

Static analysis result for SHA-256 29672905b0b0de72…

MALICIOUS

PDF

83.8 KB Created: 2021-09-09 19:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: bddd66bfa47de271928616d5becf60f4 SHA-1: 8e9e88999fbe5d3bb2eae7279308a816a1a58540 SHA-256: 29672905b0b0de72972538d830a5100bc4423b8ea52a4cdf79040a0bef8112c9
126 Risk Score

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 0.9955

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://ketchas.ru/uplcv?utm_term=demian+the+story+of+emil+sinclair%27s+youth+pdf PDF link annotation
    • https://chambres-lannion.fr/userfiles/file/ferewuso.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/875845885.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/61478396521.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/gewebulutakulokukiragefa.pdfIn PDF document text
    • https://cuatudongsaigon.vn/uploads/files/14861446081.pdfIn PDF document text
    • http://dfanchem.com/upload/files/nijipuwe.pdfIn PDF document text
    • https://renteci.com/imagens/file/solutepa.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613512fbcc43f---pinomavisizopamovewixivij.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/bureminosupejewo.pdfIn PDF document text
    • https://attack.lt/images/files/mixawulagurexopefixose.pdfIn PDF document text
    • http://uts.edu.co/portal/app/ckfinder/userfiles/files/kumow.pdfIn PDF document text
    • http://directopinion.biz/uploads/FCK_files/file/46357485154.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/senajubegepoxusebelepur.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/4239459003.pdfIn PDF document text
    • https://planningpvedh.nl/ckfinder/userfiles/files/87797849160.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/81057690039.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/25244403752.pdfIn PDF document text
    • http://sun-tes.ru/files/file/tisobi.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/54837164398.pdfIn PDF document text
    • https://illinoisfiscalpolicycouncil.org/app/webroot/userfiles/file/43746337269.pdfIn PDF document text
    • http://epilia.com/upload/FCKEditorfile/88953596377.pdfIn PDF document text
    • https://elmawadah.com/userfiles/file/18056222495.pdfIn PDF document text
    • http://gist.adrianlechowicz.pl/userfiles/file/zusisubekivukuwara.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/52242971868.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://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_off0000e158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE158 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96A 17908 bytes
SHA-256: 6f02af8ca69533a97660d54e471b15af644306165029534867a097d3da275743
font_02_sfnt_off000127b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B2 11132 bytes
SHA-256: 868acc877c6f4efa2ac6daa0be721f8b9446cf815d97a8889af76fd4e664cebb

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