Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15c81ee0cfcc22e…

MALICIOUS

PDF

82.9 KB Created: 2021-09-07 12:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ce1fac1f0041ae00509d81a5f49ab1f2 SHA-1: af6532f7d0f127edfdb56e4832ab3fe15b4bd798 SHA-256: d15c81ee0cfcc22e6cfdd5fc72983ebf5e1d618a98c1081eb5ec6fce96c9191c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is part of a phishing campaign or a distribution mechanism for further malware.

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://cructi.ru/uplcv?utm_term=valhalla+room+manual PDF link annotation
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/58ml5k9ek95dkaq7dulkl2egp6/93192167042.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ade9dc842---sijiremexusaloburexak.pdfIn PDF document text
    • http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/78078447065.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/faxubidixozede.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16133005d96c9a---24850215698.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/6277553612.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077e0d5b9018---2294974385.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/ruwiwudidofowoved.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210708105814_289412033.pdfIn PDF document text
    • http://przyrodnik-kujawy.eu/userfiles/file/jojudafisavedomivovadeni.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ecc2d0a67---86771574708.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/13100674248.pdfIn PDF document text
    • http://emmanuelmissionarybaptist.com/clients/74938/File/saluxutidiwonif.pdfIn PDF document text
    • http://travellerisland.com/files/vovemix.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5f68ef701---kufejabamedokodoso.pdfIn PDF document text
    • https://coil.hk/upload/files/muxavuxekirusomijopi.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/47236939201.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/82513318306.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c006794c3---84920045913.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/7810082728.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15296829193.pdfIn PDF document text
    • http://fletcherfamilyreunion.org/clients/52745/File/xigogiva.pdfIn PDF document text
    • https://jetaime-shop.com/files/80361634936.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/pirolekoge.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f6a847a2b---zusijis.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_off0000e09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09A 18176 bytes
SHA-256: 4b57434df054470d40d3f6d9de88da0bc05ae5c19dfa0b1dccd5cc045136bf9a
font_01_sfnt_off00010fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC1 9952 bytes
SHA-256: 8cb43b0962db483e404bb86c7f160e4550b6be0e495a9e1e2fca26d01fd5969e
font_02_sfnt_off00012584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12584 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.