Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc2e92c618ac5b64…

MALICIOUS

PDF

85.8 KB Created: 2021-09-22 12:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bb7a7b93468aaaf8174b6a6e9032acd5 SHA-1: 2c0f358c93dd5667e34dea55c63896bd8e711427 SHA-256: dc2e92c618ac5b644f9510bac6bf4e4d3c342daa5dec024bf3989bac81073edb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or to redirect to malware downloads. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags the document as a link farm on disposable hosting, supporting the phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://medvor.ru/uplcv?utm_term=cara+mempercepat+internet+android PDF link annotation
    • https://vipbeachhouse.com/uploads/editor/file/faxetimakara.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/fipasakobin.pdfIn PDF document text
    • https://promaxsuspension.com/csmimage/file/92383324550.pdfIn PDF document text
    • http://a-xian-coat.com/uploads/files/202109061531562770.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/94197517298.pdfIn PDF document text
    • https://casadko.fr/userfiles/file/83324852751.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/84379639705.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/88629134277.pdfIn PDF document text
    • http://scro.ru/pic/file/kiruzovolusanonuwibevoza.pdfIn PDF document text
    • http://fleshlight-tw.com/userfiles/file/23714658073.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/nodujobuzokezimufozug.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16147e7e77bf92---63591872869.pdfIn PDF document text
    • https://xuanhongkhang.com/upload/files/xozozinerifa.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/wibagegazefuvomiwudofok.pdfIn PDF document text
    • https://n-tlg.com/files/file/kowowakudaxid.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/nubofezod.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/dagajaragewakoxajuxigen.pdfIn PDF document text
    • https://unitytradecapital.com/ckfinder/userfiles/files/zamosovogumagejaxoxow.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/57475387347.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/majuvumunox.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/sexebebifozazatavojagasib.pdfIn PDF document text
    • http://shesob.com/file/files/volevisisego.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/tanosowosupadiworapajorem.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/mazisojijururixu.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/53962131439.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_off0000ebc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC0 10492 bytes
SHA-256: 129c5e070f97776a7b4db0ff13d8a81538a2144e5a071662159f10533de69f44
font_01_sfnt_off0001038d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038D 17532 bytes
SHA-256: f47b1d4b7bd8117a0753c06cb443d546da168a796739e9eba043747edd05c993
font_02_sfnt_off00013147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13147 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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