Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f45af6461f3802…

MALICIOUS

PDF

88.2 KB Created: 2021-06-25 18:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: cb0280cec9015624de6bd522f77aeea1 SHA-1: cac6d71e70c2a707429d421db2c907f929369d95 SHA-256: 69f45af6461f3802028a8da510138c0af85ffe803e8e569d7d8ea91acf4f0856
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, some of which are hosted on compromised CMS uploads, indicating a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further suggests a phishing or malware distribution lure. ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=best+calligraphy+styles PDF link annotation
    • http://kapsalonvogue.nl/files/file/4440344998.pdfIn PDF document text
    • https://argumentua.com/i/file/51715538550.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aff2f632051---12341857679.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bba7e4c48b0---gigoxasusuvawurevazusaj.pdfIn PDF document text
    • http://coffee33.ru/archive/file/85871151209.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/xafaxopesogamuvofebivax.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c47b998558---pizidivigivifozipejota.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/42988640300.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/1664f30ff0b265576e99974cdeed9fac/24167612616.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/wemidaxibamojimajud.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/retawidugenoxuvudozukuboj.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/qng4c0odqsei28h7em728no582/sedibabasurogerobusage.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/e8220a461fb6c12437fd263d9d3d2239/56633371349.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3806e67f4---11754836256.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bbc5b6d57---73061975323.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714c0cca7c8---78149455836.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/83252593705.pdfIn PDF document text
    • https://activepymes.com/pub/file/97837627647.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/e4ef16d05d7d377c0ca7a02728f8a4d5/69903178521.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090aed988ca9---vixinegarusid.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/votixitevavefal.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0827be3ce---fokexefaratetetulixeso.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/28937f3a75edf5819b88f718770b8c9d/pokuduwixedemomutimapufap.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/iscbiv5d937eqcnembgjd0c8us/96926994143.pdfIn PDF document text
    • http://movementlab.dk/userfiles/file/65419188676.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_off0000f542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF542 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D59 10596 bytes
SHA-256: 773d9e48dbb8454d8fdd15c9905435d116c9856f3d7209ee41a2c91e46bacbff
font_02_sfnt_off000125bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BB 17472 bytes
SHA-256: fa49454082c65e6d3c04a87ff8ea81b6b9d8c35edbeb29e656e5f66f4234033e

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