Malicious PDF — malware analysis report

Static analysis result for SHA-256 492729c65e3e2d10…

MALICIOUS

PDF

84.3 KB Created: 2021-09-14 01:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df487470d677f3d1ffb44e4ba622f753 SHA-1: 1ea24a03aa77ac69d3eab0c493629cafb5e19cb2 SHA-256: 492729c65e3e2d1063aa027a4111de45f1881c692f1087764f422d69ecdf1402
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://nomylo.ru/uplcv?utm_term=watch+the+man+in+the+high+castle+season+2+online
    • http://clubselectionvoyages.net/images/file/91856809751.pdf
    • https://mygenius.ru/admin/ckfinder/userfiles/files/bamopazik.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613169958b76a---55445792727.pdf
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/lepunuku.pdf
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/sajiwo.pdf
    • http://yousefmaktabi.com/ckfinder/userfiles/files/lupaxedamotuv.pdf
    • http://sm.ac.th/ckfinder/userfiles/files/punibubawusuf.pdf
    • http://krukaiart.com/userfiles/files/wizeliziguzaxuxeguwibib.pdf
    • https://marblobaths.ph/app/webroot/img/files/82831648948.pdf
    • https://maconlux.lu/userfiles/files/ripesaporelegup.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4deed19e6---15881532445.pdf
    • http://costruzionibulagna.it/userfiles/files/2128780618.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/e393201c98a083e3166815c7b8cb490d/mapadofilix.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16131ae457a1b2---punerugumiboxised.pdf
    • http://perilatomsk.ru/ckfinder/userfiles/files/5329731461.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc0819c7ae---nupenisomesafuzatozevub.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d292de0e2d---83592562628.pdf
    • http://egyptlance.com/userfiles/file/zigosu.pdf
    • http://niszczeniewaw.pl/userfiles/file/vuwunepibilalobegera.pdf
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/74771035891.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/23747bd1598a932b336c5d8bd53630b9/ripogokiweziz.pdf
    • http://www.wiz-fac.com/uploadImg/file/visezimez.pdf
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/4467213722.pdf
    • https://rinducm1.com/contents/files/38728245982.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16133887ad5c2f---27421187341.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a6.bin
925edd7c59d76db58a65f2c81659c87a2235d601ba2bf0bb08ea8ede41acad6f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A6 18520 bytes
font_01_sfnt_off0001129c.bin
fa808f69d11bce18986ea3a5f6e4f29941f180a22f8205eed43ce86faa2d6809
pdf-font-stream PDF embedded font (sfnt) at offset 0x1129C 10692 bytes
font_02_sfnt_off00012b0a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0A 16792 bytes