Malicious PDF — malware analysis report

Static analysis result for SHA-256 6414fe3e8c500f00…

MALICIOUS

PDF

90.2 KB Created: 2021-07-02 11:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 81e387afed5ddab95d9548076b02791f SHA-1: f1a8a98fbe6b8ad4b2de39d26e7e792cbe44af40 SHA-256: 6414fe3e8c500f0066bfc1afc74faf4af607efe3f39156ed03c455afe8949e37
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to external sites, some hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites, rather than delivering an exploit directly within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://allytemp.ru/uplcv?utm_term=the+half+drowned+king PDF link annotation
    • https://collegemahan.ir/basefile/collegemahanir/files/zuzalibir.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c387863498b---juvazis.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/66484552003.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/e24b24ae9481cf44e60207373ae30207/77500384118.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/nigepebukupetizokumabala.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/67102584736.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/webenosivujo.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/fumibe.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/75484300478.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/vidizubotatimusajiretuwo.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160adf971d1976---50138474240.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/12cb13f3958657e3ac68367770961b96/wugisoz.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/814bb0f66a316d669f13ac429f486008/maviwo.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/11376976208.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/fisifomorofefapukilu.pdfIn PDF document text
    • http://mkngsp.ru/upload/files/fokogimutosezovibutup.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/vurof.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/28901933478.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/46385296660.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///domudadevigixomi.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/goxesavasogemijopepemazat.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/muponevetaratizoke.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3c1494ab99895efa58662a7cef9565e2/kakuvizoxogobixade.pdfIn PDF document text
    • http://samtekelektrik.com/files/nefobosaxarikezuvopa.pdfIn PDF document text
    • 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_off0000fe2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2A 10508 bytes
SHA-256: c1b1c1530cb05bfacef37b4438bdea2d16f5d18d5da53b79b896a5f7dbf035ad
font_01_sfnt_off000115c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C9 17760 bytes
SHA-256: ce745d404075530afcbc972d370db906eafe9c200e7a22f1aa555002bd833d83
font_02_sfnt_off000143c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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