Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63105f9011c8be7…

MALICIOUS

PDF

75.2 KB Created: 2021-08-22 04:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 9901299e69ab4c2d0ca8025a024572e9 SHA-1: f76e2f24e621d165c58539a184ac1eacb1c92173 SHA-256: e63105f9011c8be787c0ed538f7288970b5ca6f73f9f5fb11950017446ee9851
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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.
  • 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://irlanc.ru/uplcv?utm_term=bhojpuri+song+dj+remix+hd+video PDF link annotation
    • http://cesishotel.lv/res/wysiwyg/file/18021380405.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/ruvigefamigonabeniputi.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f12dfb5c4e3---mekizagojefi.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/95941564236.pdfIn PDF document text
    • http://zigzagontwerp.nl/sites/default/files/file/63161819723.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd61947f4f---lewebiwegagotedupa.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea4ef0af71---75270700834.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/41490057689.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021082010355473499.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdd4834e1e3---widofazosit.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/sumetojoluneverenuval.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/balov.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160ae39c96e1e1---20209164925.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/datenujofupaxuti.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/3713777388.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b4650cf1d---bulidofaneni.pdfIn PDF document text
    • http://allasclub.com/campannas/file/kogerapilepirafoxed.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/loderigozawenot.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/6d902aefae6e0e6e9fd9e347704ad037/zutaxezi.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c889eefe70---84120673856.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/na716qo675sro5ckhlpgm6bio0/zugepusuwi.pdfIn PDF document text
    • http://bluefield1966.com/clients/26642/File/81051656434.pdfIn PDF document text
    • http://espressoperfetto.nl/app/webroot/files/userfiles/files/66921064660.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA05 16000 bytes
SHA-256: 6aab900cfd5d38b97c1d44df556120d21d1b4f98aa04948c911d2d1bc99c7640
font_02_sfnt_off00010363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10363 10984 bytes
SHA-256: cb90d721159b568c6ee93bfe26ec7e2e19c56d1f42c2f8715a494fba3369f022

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