Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35811201d134459…

MALICIOUS

PDF

87.2 KB Created: 2021-07-02 19:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7c23849d0e1d255b61a18b3977d66f02 SHA-1: 5d49a255c777588147f8fbf8999d6a4a38a5d7ba SHA-256: d35811201d1344591948e3a23b7bbfb0581e7080409b47913e13be53d0b9be2f
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a large number of embedded links, many pointing to WordPress installations that appear to be compromised or used for hosting malicious content. The primary attack pattern involves directing users to these external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a479197465a---25977534767.pdf In PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/v46b2p9b7ah7g5rjassrjbm5j2/budep.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/4di6covv5lr4bgrtqd8eef0q36/nuwuvaxe.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/gurorimimepuvosuge.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210620071731.pdfIn PDF document text
    • http://ldbell1965.net/clients/85689/File/bamekokevasonukafo.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5207357ad---seranori.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/d50c5f075b67538e303a5b212f155a6b/97999331593.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a148618ca08---jalubepawuvorazim.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/5kke8cm4l94jlksa678l13f8c1/jotatev.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/rht6i74t95vkq6vl6s16cbduf8/54411249932.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/48749541624.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/56260674886.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/nld7c0ae9qg60ogpslqrsaha45/49439974888.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160df20225b95d---welovitejisur.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/buzawulafukasubiduj.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160842fc13e3c8---6602903780.pdfPDF link annotation
    • http://jkmdc.com/aversystem.com/userfiles/file/kalop.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/sekewutujudasenodifipav.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/27188336460.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/27d1e3e0a4997a4b1d8fe4a971ea712a/76845557322.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/29249597412.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa58a6352fc---46374304322.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/77105753f72fa2f6b082ed20883ba6eb/guwubaju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=hotel+quiz+questions+and+answersPDF 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_off0000eae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE3 20668 bytes
SHA-256: 0ee60056b975a2490cb45f24effb1625aa3934004d1ea6d2e20f00da778e0209
font_01_sfnt_off00011dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C2 10624 bytes
SHA-256: f2a4296a8cac32cacdfc6a7669c30100e4e9694f5d152767dd9e26e1edec3bae

Open this report in the interactive analyzer, or submit your own file for analysis.