Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f683c0695b581a…

MALICIOUS

PDF

89.3 KB Created: 2021-08-18 21:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 093cdb3c153da9f9caa913ef639473b3 SHA-1: fd72b1eb057ef893aa4123946d25219d03de5a84 SHA-256: 46f683c0695b581a3788d337b4ca23cc08d46e2615fffa8c540556de0047cacb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to PDF files hosted on compromised WordPress sites. This suggests a link farm intended for SEO poisoning or to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/e9ac3c2c7ef22c2dc9a617474fddf983/42747871596.pdf In PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/66329530043.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/nozuva.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/kj8dpjn4o5blq0pbbq2j091gt2/vewam.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4cd071d68---sisaxugizodolow.pdfIn PDF document text
    • http://arslanemlak.come/file/xifugujulakamijene.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/tisuxaferil.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/sidajijolovezebebamun.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/nihupsud6gkqg88e9dpgi7dk1j/lilovusopidal.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/nerukamikigiruwikoxa.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/51371047655.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/bawamegetosodukifemifeg.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c95e3868146---pewituvag.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/g2d8hfb160mbhg8dkb12sui41h/28832939900.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087449231917---98755604795.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/40482878047.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/56301567836.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607447267a264---zabegedelibawusuzizuv.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/11817873646.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/f028ef6a6a670c57fca0fdfc5ab543da/xiselogubulilaso.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946929926bc---84795225996.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/voremol.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/dutamosatowal.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1d4d0aa55---80790137169.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/mo2i4ndjflcmjsn669na5ik1ri/68570343999.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/4c8b64830dbddce4985e01eeb3976900/nuvovemejezivikebel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=shrek+1+pelicula+completa+en+espa%C3%B1ol+latino+blog+de+pelisPDF link annotation
    • 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_off0000f35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35C 17708 bytes
SHA-256: e33045824627f54ad0cb44a8fb572dc778dd0b68a802d065d7c94956015e7c1e
font_01_sfnt_off00012003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12003 11624 bytes
SHA-256: 164ae4d021dc558d9d41b9dec72b3cc129a2b683a1e7d7daff280543df7709fc
font_02_sfnt_off00013ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ACE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1