Malicious PDF — malware analysis report

Static analysis result for SHA-256 4709a20d8f48f8e5…

MALICIOUS

PDF

97.2 KB Created: 2021-07-13 02:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9b9433c4bb1f73ef0121af6e1638e553 SHA-1: 53b7b0d36a7210b446558d172843a99ffa4e8ea0 SHA-256: 4709a20d8f48f8e59ee2a8b865ba909a4b6bc52eb4068b71965c792529a44352
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://crysiq.ru/uplcv?utm_term=real+turbo+drift+car+racing+games+free+games+2020+mod+apk PDF link annotation
    • https://atkarisuli.hu/userfiles/file/16413255314.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ce52456cf---94503677830.pdfIn PDF document text
    • https://kawanmto.com/contents//files/76215638240.pdfIn PDF document text
    • https://eternalbliss.net/file/rikiribenitomajed.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/31e01422779de0ad224259a685509d28/fewetexugigowe.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/6274170314.pdfIn PDF document text
    • http://mlight.cz/archiv/file/xuzurojizunumikotoju.pdfIn PDF document text
    • http://weclassof86.com/clients/6/6d/6dc59c75684a9be5e3a4726337e2fa3a/File/gumuneridu.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609104e62f5ff---60930990335.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/86746189080.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba93795adf---fevixomibamalebotex.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b05d9bb6cf3---11765001338.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/1203ecf45cf119465641759c2037a231/18284432248.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/37154709706.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083d262eb771---47932734490.pdfIn PDF document text
    • http://myphamasia.net/upload/files/tegine.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba828c97b2---16498932998.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/86149036482.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/31670e8e1eac54d80117e83ad5603bbf/xazutepajukumod.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/nafusenapod.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/kitidonesogejose.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/xagapofunawepirawijo.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/93736783603.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/5e5b59638e86629aea266b365cada188/vodariporajajetuvibo.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/e58f534c53e7131ee189b080de53ef51/79627975184.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16085bed3587ce---5777291695.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7f5ab6fd5ae71db97fca0536a5d65bbe/83536651418.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_off0001161a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161A 11580 bytes
SHA-256: 40b20e7c67b87e9936b90b0a2e1147dd21be8d89359b6ac2e58b960bad8c8cae
font_01_sfnt_off0001312e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312E 16788 bytes
SHA-256: 274adf5f763cb9040c35cb09c46d93a840f97d6cf1f460c64899aff1634f2d32
font_02_sfnt_off00015ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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