Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af3a299afb48cb1…

MALICIOUS

PDF

82.7 KB Created: 2021-09-06 19:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a49e5e16ae0e74da426abb195fdec8f8 SHA-1: b24c18989a569e5fb0642edf2f691a0e26a2687c SHA-256: 3af3a299afb48cb174ed95e140eca6e5239446d8e9ccf0eeadf4e3e7fbd1616b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. The presence of these links suggests an attempt to lure users to malicious websites for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://krisoc.ru/uplcv?utm_term=instruction+manual+instax+mini+8 PDF link annotation
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/961stmu9iabonneoph603cs7ug/lobowesejeg.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/pexenunalofelezodaduxenub.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/36e0b2dc5e94940cb7d614543895efd7/66578124225.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/57715060392.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/duwigivuga.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/manapikexa.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f1f2363b1---tirupufitusa.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/a1f4d331dec451930d6e2ef3a9c0c14d/dajof.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/renivelozide.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/30654450488.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/fezunon.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/46008114014.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/xumodokizikezuwuf.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071944b04ff6---5338517223.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7b9bb2341---mepejimoxubejevule.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16117b9db0c4a9---65304026271.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efc8556fc8---jipafalaxulu.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/71102405712.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610a976a5d00c---81555731189.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac100a3b75---mutevimuwagosowiri.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc1440c7305---20442400965.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/b7df8ac34f704d45f83959644a0ebb8b/88685673709.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160880457b183b---82767183242.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/6223816973.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_off0000dcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD2 18208 bytes
SHA-256: d0715894f95c495bd797fc8651c48efe37b1ea97e201568ad25d5b87e066e354
font_01_sfnt_off00010c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12470 10620 bytes
SHA-256: 30e52c6c688ab07252d2a447772ea0c2e4b889c89dbd104ecb5c51317ee7d1b7

Open this report in the interactive analyzer, or submit your own file for analysis.