Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9452662f79f091…

MALICIOUS

PDF

91.4 KB Created: 2021-08-15 08:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 260450bf93df0964d232a01018a055d2 SHA-1: bfbb7fdb9dc3eee9fa3fd72d8d3de55920725b19 SHA-256: 0d9452662f79f091d4298a3f6ec2fe687ab98070f2f811e8f5947045e860eaba
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or appear to be part of a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the ML classification suggest the document is used to direct users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://krisoc.ru/uplcv?utm_term=los+puentes+de+madison+pdf+descargar+gratis PDF link annotation
    • https://0a3exp.com/upfiles/editor/files/2860333720.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607584024dc7e---rufuribepu.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/98082078183.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/56503758948.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97ca51b1fb---37862428568.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/betereboluriwano.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/giwajeveful.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/46064966766.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160921bc0703be---91597359608.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/b8e6a583d0356c9da34f5a2faab49c3e/mimekiwazikedevaguge.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/0f54fccad1e8b3ddbc71f081eb57dd72/firotovudapajusasotudatof.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/23659964035.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/zanabib.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c915581c00c---wutovorewu.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/2339b3edf0601a5bdfedb2545797a994/82048439117.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210528_90BC8DE970C1CF71.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/hmhatfl4v59u4er5qn1v3gk6m6/80362990079.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073539763d95---dewulatesixoxaxenomonifo.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/nikebemavez.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/fuwita.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/mobitaguji.pdfIn PDF document text
    • https://viettrungson.com/media//Files/83485180803.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e8d5d5222---35452485236.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/7eba4c2b219c1adeddb17a9bbc942124/55687951470.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED72 10976 bytes
SHA-256: 64e70cf3fe8bf30c3a64f5ea0ba73beed45ea60fd21f8a3c24ff01b4df51ba2a
font_01_sfnt_off000106ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AE 2768 bytes
SHA-256: 0971f5022e7d9333b576943a6d4247ef13dc5005e4cbace86bec309cf58355ff
font_02_sfnt_off0001121c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121C 19556 bytes
SHA-256: c3a235aed6c105470640446d59e2314b62da40a97e367605e1be71aa831cd590
font_03_sfnt_off0001440d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1440D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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