Malicious PDF — malware analysis report

Static analysis result for SHA-256 f23e5933ea0fbbcd…

MALICIOUS

PDF

79.1 KB Created: 2021-09-18 08:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aa3974e4f67cc2a30b88f8cf7c61cc88 SHA-1: 563a6d0cc7764dc7dcf34696624c805ab014ba06 SHA-256: f23e5933ea0fbbcd7fd9edd029ba803cc9183f2bca8312f8f7dea1b4ee3da9c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple disposable hosting domains, with one URL specifically mentioning 'chicken gun game hack download'. This suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://lodoshosting.com/calisma2/files/uploads/90791940808.pdf In PDF document text
    • http://etre-belle.su/images/file/pugimezolixopitas.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/8974573400.pdfIn PDF document text
    • http://isotope3.pm-ural.com/uploads/files/16147143662.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/1l7d1ckuj540mt059eo2951gh3/73012947355.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/64269311356.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/pemewuf.pdfIn PDF document text
    • http://www.offshoreyachts.net/web_upload/editor/files/82482514281.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/26568548722.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/savot.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/11009965936.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/xeserezupedujigewijin.pdfIn PDF document text
    • https://hsse.hssanesteban.cl/files/wevuxonipajon.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/loliwuweruvudapanesas.pdfIn PDF document text
    • http://pileki.com/imgup/file/3624494835.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/a95e291a97751688f110c9843d671bd8/90625981212.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/17797812239.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/73361853258.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/26687298117.pdfIn PDF document text
    • http://royalleasingny.com/admin/images/file/napipusetowegudarir.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135282960c22---93233882063.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/94524461972.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/kibekatidodopasewuwari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=chicken+gun+game+hack+downloadPDF link annotation
    • 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_off0000d2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BB 10760 bytes
SHA-256: 2ab93678551b64871e04854aee56aee5ff0bc14991d69e4f907598b380eb1e38
font_01_sfnt_off0000eb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10333 16852 bytes
SHA-256: ef90d70a19318d459f1056f7cc544d68bba1c3503f7400adb01a277fe1899dfc