Malicious PDF — malware analysis report

Static analysis result for SHA-256 87fafe35a97f188e…

MALICIOUS

PDF

80.8 KB Created: 2021-09-18 06:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8fe4c308db5781771e7df2aecc02ade6 SHA-1: 9f4ebbfc2ada005418b630ac68898941d1e6528b SHA-256: 87fafe35a97f188ecd6f7c8390bc40390af54af9c8dc7c7af932bfae1c7234c8
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous links to external sites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users. The presence of an MFA lure heuristic indicates the document is likely attempting to harvest credentials or session tokens.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=football+stars+unblocked PDF link annotation
    • http://autosoftware.company/autoresponders_images/files/12050358764.pdfIn PDF document text
    • https://senegal4d.com/contents/files/rupupene.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/63582461459.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/matuwukofeb.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c972c72c6a---53644818107.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/8196bb4573e72ce90b36354d117c92f7/novidekuxexilo.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/1843670450.pdfIn PDF document text
    • https://dauglita.lt/components/com_mijoshop/opencart/image/data/files/79972906315.pdfIn PDF document text
    • https://lotteppta.net/beta/assets/file/25867706854.pdfIn PDF document text
    • https://korankertas.com/contents/files/tuwebevuvulekekib.pdfIn PDF document text
    • http://esistore.com/userfiles/file/74883404252.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/vobibapadumubamodasubuf.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/bekewowulenol.pdfIn PDF document text
    • http://lso-msm.com/userfiles/file/xipala.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/depinalejunajaxurilif.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/81286374433.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/rowulazulupotefefadulu.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/44061630130.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/furajobomapuxudupeme.pdfIn PDF document text
    • http://baominhlabors.com/upload/files/72609783077.pdfIn PDF document text
    • http://1-sanya.com/blog_images/blog_/file/107110636.pdfIn PDF document text
    • http://lachina.cn/upload/file/87042075777.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161345608e3477---74650207271.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/3c484834cd78abb382b5fb747cbc131f/60949823725.pdfIn PDF document text
    • http://markone-tools.com/upload/files/68973084222.pdfIn PDF document text
    • https://basisnomor.com/contents/files/12221649698.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/40860001316.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_off0000d6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE0 17956 bytes
SHA-256: 5bd9acf996920ad4f76e80676bf8b4fa6a4bac1c63c2f0ab579362fe0a4a3f9a
font_02_sfnt_off00011da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA5 10580 bytes
SHA-256: cccd46d08211ddbf18b1367eab2ba6d4941ea797189d554b84ca1ee6983b619b

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