Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffdabcab6b447c07…

MALICIOUS

PDF

89.2 KB Created: 2021-08-22 03:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4725459d95617b45affae086d815439e SHA-1: 66d848a6baf85de4fab909fc9b1331aa83c8c08a SHA-256: ffdabcab6b447c0734bc35bb4c91bbbb1cddb63b55905ad811674f341d24c0a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable domains, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nomylo.ru/uplcv?utm_term=pancake+bot+commands PDF link annotation
    • http://decamiones.com/userfiles/file/61401852898.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/1711856620.pdfIn PDF document text
    • https://micro-churches.net/uploads/file/43092071978.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/wewinilatijod.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/kemetewetiguzof.pdfIn PDF document text
    • https://invest.pl/userfiles/file/wepibizinodidadu.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096d88c19e34---bonivuzet.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/7611378223.pdfIn PDF document text
    • http://yanarfabrics.com/firma/files/bufiduwoji.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eff0d3bcfa9f3c4c4c439a43a2126b95/donenuvebu.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/pisatuzagedakovagowewuge.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/muvej.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/e276fagg32r17te9mt4q6m337s/20644749247.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/t11qen8m62fchonfp1o87mda14/vufuwakimisidamu.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b604f19a35c---32452571054.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160713d370a5e2---fobemi.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/34743208641.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8e3daa2e2---powogewinozenepagosagad.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210605212925.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/93812576137.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/93143290473.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d8b6b93e5---46697623625.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/rewejukiv.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c9773feb1db---pugikakozadoximotu.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_off0000f562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF562 18636 bytes
SHA-256: 2348f6744a64f469fbc1cbe1c9e6520ad9582765211c33a83fd742be10d9f1ac
font_01_sfnt_off0001265b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E72 10528 bytes
SHA-256: 350f854c0aaed05512f4240318949b1ba3a7fd4ec3cb1bd828b210180b35297e

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