Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e02bc1212719cc1…

MALICIOUS

PDF

95.3 KB Created: 2021-09-04 15:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 985e937ccf0c58c239f05416512c4602 SHA-1: 61639a441ae63388c638d3e1836c26f65db401c4 SHA-256: 5e02bc1212719cc1e9a56ba01922a906ebd8ee22895b7c3a8ffa5307ecce9d27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest a phishing or malware distribution intent. The presence of multiple external URIs and link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://coretry.ru/uplcv?utm_term=best+pdf+editing+software+for+mac PDF link annotation
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a3e614d77---68789214925.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d1732d85a---padolib.pdfIn PDF document text
    • http://xnucleus.com/members//member_images/files/3017053248.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/9cc97b1645f4d14192209eca9adf6685/45300603745.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/zuferuv.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76065af99d---33384679922.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/wagefudumifukomukutubutud.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ee8c1qn9fdsin29ebjb4eh36ii/wogepaxunowafobidegosim.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/3d8be63f893095197ba9af3f00a0670f/pilegawedawusizuxife.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eaa13b0227---tipepatif.pdfIn PDF document text
    • http://ltptech.vn/uploads/userfiles/file/13123280710.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160c52964373c3---58774394340.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b70a72739a---molofinu.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/72ac2f5ca5ba2d711f58b3f0eaeee09e/xomezojowozidule.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/buxibugatikujumubevit.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/eedbca8cb348d6abd3d5c74b76c5ac17/29175664243.pdfIn PDF document text
    • https://posh.hr/files/3520062766.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8a68d80af---75214358639.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/15625323133.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/zazekesotu.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/tirukawanofamurovamex.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/12573730791.pdfIn PDF document text
    • http://immopolignano.lu/images/muzoxafuromuzupaz.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/dabevusixitotevuzukusot.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_off00010fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000127d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D0 11056 bytes
SHA-256: 21d0dddd80d08e2db4e4ebe4f57a92e2fc0f4e8e920f3abf18e79a81fa191715
font_02_sfnt_off00014177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14177 17936 bytes
SHA-256: f6861254abafabf3f240e9b29e605deec732e7ce8abee40ac54077030d12caaa

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