Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c0e148e5b29fb7b…

MALICIOUS

PDF

83.7 KB Created: 2021-08-11 13:38:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 92a98f2dfbb970bac3387833aaf87533 SHA-1: b4d5c698d5be84f19c0f756af9c4608b892d6aed SHA-256: 9c0e148e5b29fb7bcb6821c953df0aa9ed8f834ba2482200e07edd02fd48b0d5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external resources, many of which are hosted on compromised websites and appear to be part of a link farm designed to attract traffic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the presence of embedded URLs and the overall structure suggest an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/adcfa646dc26ed770ae718fd6b0ce44d/96158817447.pdf In PDF document text
    • http://creativecoms.net/userfiles/file/98358917115.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25f224a6fc---momivizegepofepufaxaduk.pdfIn PDF document text
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/medideraligegegatuwaraga.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/29e778c0df269e041e7e6a79ece2489b/xoxarotokujefumagazajawim.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/94371338379.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/38322140458.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077904e9895e---52946116851.pdfIn PDF document text
    • http://baihsad.com/userfiles/files/20210707_010838.pdfIn PDF document text
    • http://proxima-design.cz/files/file/8783823320.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/e25b0250f6ed4acfbb846a17e46a6ce0/ladimevofomasubo.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/nineto.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/4342db88e4beadd3ad4390b7795b514e/setitis.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/81d1f4809dc69b08951634febff06035/vanetonojozujubuvin.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607470391efbd---duroj.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/aavvcuc07njm53tp5a85il0mp3/tebogobanur.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/2911c52eb9ab7bc58bf7a69bf216b940/xusuziremevexonivupibila.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082199a51368---zalikigazewed.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/xijubozobiwo.pdfIn PDF document text
    • http://cuatudongsaigon.net/uploads/files/17741614550.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/genazirekafas.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/ribozejimuxufezixise.pdfIn PDF document text
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/judijujilapun.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/sozowubulupasezorenegiri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=gta+san+andreas+ppsspp+file+download+freePDF 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_off0000e477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE477 10616 bytes
SHA-256: 42bb64309281658499680ce750a44ae6fa0a2eb5eb538ed138506a917ae8d5f5
font_01_sfnt_off0000fcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11501 17088 bytes
SHA-256: c32c80cc35e121d244b150055fc7e6dafc4d79108623286ae503738f537bf08d

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