Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d545c1f9c2e496…

MALICIOUS

PDF

90.3 KB Created: 2021-06-25 12:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 249537a2d7f0cf6c1ee759ff75af1713 SHA-1: d97ca6abfcfbf545b052add8d1ed35e347e603d3 SHA-256: 34d545c1f9c2e4964b55c9f52a52b920ba12e27a979c0c0b130c2d8cc2821c7a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on multiple compromised websites, suggesting a phishing or malware distribution attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5c9381447---61658129940.pdf
    • http://refpecsbelvaros.hu/kepek/files/52984686684.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae81b7c4174---84350898242.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/a3a39f30333be30cc4a940f7b2fedf4e/tepalezofasevuxivejo.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/b50c7bc42697eae04a3aab5aaa864459/poratimozasunejijudizima.pdf
    • http://kxnjl.com/userfiles/files/vedowesewagupukejiliwetur.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bffd082317b---36712795843.pdf
    • https://flyingfish-stay.com/userfiles/file/bexagekumapuridesexixa.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/b13u82em3247th92cn9osd2e97/57054334931.pdf
    • https://semagro-msw.ru/pics/images/file/natuxebigogumitusupis.pdf
    • http://mujuerp.com/uploads/ckeditor/files/20210609045339.pdf
    • https://balajitutorial.com/admin/userfiles/file/68108637040.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160715f634b95b---35164086519.pdf
    • http://aodaibooking.com/FileData/ckfinder/files/20210531_A0AC5EF5E5F4A17A.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4ced60110---rafekevamurariz.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/52rq8bnn5ak5bako5quejrprf7/60979558672.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/hik3t9atl9o7m2ie1bavtk97rt/jivadi.pdf
    • http://work4shop.cz/userfiles/file/walugazajekakaradozodux.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=uk+answers+yahoo+com+questions
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://uk.answers.yahoo.com/
    • 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_off0000f1ec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EC 16792 bytes
font_01_sfnt_off000109fe.bin
28d22af247c189c8022ec38b7a209ae4dc8eef6ba556cd6dbd32088e3dec62e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x109FE 21656 bytes
font_02_sfnt_off00014121.bin
c1d9aa46c0d68cb7767e8eec2970ba16d7c6dd59831aac4a4c6c42194a6f0686
pdf-font-stream PDF embedded font (sfnt) at offset 0x14121 10992 bytes