Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2aecd6690bf1ad…

MALICIOUS

PDF

85.1 KB Created: 2021-09-13 10:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: faacee41e3ce871e2b71747bd2f62404 SHA-1: 5c28a384afd930e28a80977e83747bab8de14ce8 SHA-256: 1b2aecd6690bf1ad24cde48406b431d31691ff5eb8695cdae441b92bdb112e3e
196 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to distribute malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into believing they are involved in a lottery or prize claim, a common tactic for advance-fee fraud. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16130ef7942dd8---53022638323.pdf
    • http://fxlcd.com/upload/file/25710025662.pdf
    • http://chochosanencino.com/uploads/files/woliwe.pdf
    • https://nmcs.ca/userfiles/files/zexoxovoxegumufoxalimel.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139efc1eb8b4---38333223239.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/cd5f861ba64ba702eec401e2654eed04/lozegemedepud.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/ab70d98e9269165332800fbaa9f47179/20868835916.pdf
    • http://chenruichem.com/upload/files/19190439662.pdf
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/63773484585.pdf
    • http://olsztyntransportmedyczny.pl/userfiles/file/kasozomuvinuxozepiwowaz.pdf
    • https://evpersoneli.net/ev-personeli/file/17318437615.pdf
    • https://medicentrumnz.eu/medicentrum/files/file/bofijagelavim.pdf
    • https://inprovitmexico.com/ckfinder/userfiles/files/91645392116.pdf
    • http://hermandadperdon.es/userfiles/file/7625698264.pdf
    • https://laser123.com/geektic/files/61368127737.pdf
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/vakexarigikiregu.pdf
    • http://architettoannalisatinelli.it/userfiles/files/rokifenomusige.pdf
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/83268906108.pdf
    • http://talcmanagement.com/uploaded_files/userfiles/files/53678811516.pdf
    • http://www.findvoters.com/userfiles/file/resezo.pdf
    • https://vnnc.vn/img-hdmedia/files/27856108180.pdf
    • https://projetovm.com/uploads/files/rosav.pdf
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/97400485408.pdf
    • https://samsungklimalar.com/upload/ckfinder/files/83418310350.pdf
    • http://hagelkonzept.de/userfiles/file/zewom.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/a779219840e2b7fd52f75e6e0cbf6d8c/93140860587.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+find+wifi+password+on+android+phone+when+connected
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e626.bin
4dc5d69bc667593959281b6bbead54c281e05a80ee1a85c499ad6d66f5aca986
pdf-font-stream PDF embedded font (sfnt) at offset 0xE626 10748 bytes
font_01_sfnt_off0000fed2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFED2 16792 bytes
font_02_sfnt_off000116e4.bin
49fc8cea93de042cb9419bd4dc7fa04dc0d3593d53bd670ac3fa2f573a217394
pdf-font-stream PDF embedded font (sfnt) at offset 0x116E4 17916 bytes