Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa9368c1d5ac9fe…

MALICIOUS

PDF

99.1 KB Created: 2021-09-18 13:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: eea4b58423aec8ff87dc5434db8e43e5 SHA-1: d2cd92f03329c631331dfa8538d7afff23117ee8 SHA-256: eaa9368c1d5ac9fe3100019b8746bc28acfb25862b03be308c009c1a1b2671a2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of embedded JavaScript and a link farm pointing to compromised CMS uploads and disposable hosting. The embedded JavaScript likely facilitates the redirection to malicious URLs, such as the one found at 'https://allytemp.ru/uplcv?utm_term=index+of+family+guy+season+2', which is a common technique for phishing or malware delivery. The overall structure suggests this PDF is designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=index+of+family+guy+season+2 PDF link annotation
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/64730760898.pdfIn PDF document text
    • https://chambres-a-la-ferme-plouzelambre.fr/userfiles/file/navojilawugogajinifutege.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/bezunegebakidufevipexiv.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0a7504b66---44956319027.pdfIn PDF document text
    • http://redskap.ru/userfiles/file/63526463698.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9aae81068---nelasinelevuzosoxeworota.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/ginirudosotose.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/41186610596.pdfIn PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/jerosuxirunorem.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/moxisetexelajid.pdfIn PDF document text
    • https://campermagazine.tv/public/file/37689038612.pdfIn PDF document text
    • https://shreegroupco.com/userfiles/file/59885731988.pdfIn PDF document text
    • http://email-database.info/userfiles/file/gopodubanejoxojofejivosud.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377b8820069---legifoleruzate.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/1470832071.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/13616907307.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/16678071579.pdfIn PDF document text
    • http://altus.pl/userfiles/file/semevagimube.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/15050731939.pdfIn PDF document text
    • https://fivetc.net/uploads/files/41030830864.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1614590771ce93---megewunulujepilivitijo.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210904163073115883.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/sawawojuw.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000131e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E0 10888 bytes
SHA-256: cfa3e4090dd57236a4564d63eaeb747b771dbcf10c7eb038536beaad250b6a9a
font_02_sfnt_off00014ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AE7 19280 bytes
SHA-256: adf6012bd94afd191009f52c62de9525e89098351636e23126334adfad2d2d31

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