Malicious PDF — malware analysis report

Static analysis result for SHA-256 34484fb04f1a3373…

MALICIOUS

PDF

74.0 KB Created: 2021-09-08 00:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f4d8f0f1bb9ebf817838c5b0832d0988 SHA-1: e812fc785413370f89ac451a0ff0e926d527dd0b SHA-256: 34484fb04f1a3373fb4ddaf313891ec14f18ee9d513524113a992ae9a27925c7
156 Risk Score

Malware Insights

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

The PDF was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with many embedded URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/6f7502b374304e71c784cf9aba2db197/kesoloxef.pdf In PDF document text
    • https://dallaslandscapedesign.com/media/files/mazakevigiketexeloxaweb.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/53223281356.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/turuxuzafikibejamofiriv.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/090dda1032671e5f6897e4be09a7501b/75225086774.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c34e9282a3---28565607568.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/hfh4q5d3rb1kee4oha11e8bctq/19051782696.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210730_6FDE7B755BB31F12.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161035a8394afc---22298797607.pdfIn PDF document text
    • http://trivio.it/userfiles/files/gezitodogabuxibumagodizon.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/jufugikejaderikotiworugo.pdfIn PDF document text
    • https://szelvedojavitasmiskolc.hu/files/files/89761107585.pdfIn PDF document text
    • http://fitviewer.biz/files/file/90429978977.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/73672833308.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/gozaxipasuwobuzadiv.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1717640ad4---24208841629.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/109720daca90c617b74e0322dafa8aa1/69528342022.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/89287212597.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/13210287109.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dd06d2040---mobixafunelotinaw.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/59519444426.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad93a64a619---xekiliwudirim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=chrome+html+to+pdf+converter+online+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB65C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE73 15044 bytes
SHA-256: 9bfe61a892e84d8c9f6439c99bc5571841de30eb1638581a06911449d72b7de6
font_02_sfnt_off0000f477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF477 15108 bytes
SHA-256: fb1af9a08951820f0e512c6d872bc33a19ea81c2a0e087340129d53ff00f6537

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