Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94afde6f1e09ac2…

MALICIOUS

PDF

122.1 KB Created: 2021-07-03 12:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aebfc4811eff2070b960dae7369b316d SHA-1: 0150d5eb55c4c751b01fb6477ec49766bf30ce6a SHA-256: d94afde6f1e09ac2f92ceaf9bbbe83db083975b7a0df4c8443b4deba3165623e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware delivery attempt. The file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of external links and the overall detection profile strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=literary+forms+in+the+old+testament
    • http://afgventuregroup.com/cfiles/file/zemofalalipetesepof.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160de6c6164283---82684853164.pdf
    • https://golf-tout-terrain.com/publish/page/file/90126190301.pdf
    • http://cosmickino.ru/sadm_files/pigapurufom.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a73ee809cc---luvovipirotozesixasoboxag.pdf
    • https://bilalyapidekorasyon.com/userfiles/file/witufe.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5058126eb1---23143306263.pdf
    • https://medicentrumnz.eu/medicentrum/files/file/24582825007.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/t0hvju0nb53sa3abhus4mivsth/59599247801.pdf
    • https://dialogueinpraxis.net/files/docs/30350204907.pdf
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/monoge.pdf
    • https://karapinarinsaat.net/userfiles/upload/file/51354880373.pdf
    • http://ahchala.com/img/file/60649240118.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/71266859017.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607769667806c---19955635676.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072798444d86---nesumapezuwonetiwu.pdf
    • http://effektfilm.de/files/file/4406048779.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/c376f513e54a1e7263d9724537593fb2/juderamubesedutudi.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/297e3801a7d93897a7178c8be659ddcc/13513200192.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7962ca57e8---dusodupogusifaponebe.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4dc8504505---rodos.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/49870418028.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e36c6a53e---xuxisofowizelevuvipomanij.pdf
    • http://cityhighclassof77.com/clients/9/9e/9ea685038b5a197d2022a69b8c6b162a/File/85819357890.pdf
    • http://www.discipleshiptools.org/apps/articles/default.asp?blogid=0&view=post&articleid=39932&link=
    • http://www.discipleshiptools.org/apps/articles/default.asp?blogid=0&view=post&articleid=39932&link=
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017d4b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17D4B 16792 bytes
font_01_sfnt_off0001955d.bin
3f131863f4e4c6be5b1556ca4e4f714c158702dccc0b9bec9261a7a92a873ba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1955D 17260 bytes
font_02_sfnt_off0001c294.bin
1b471087197b8e84b380da3a6648145962b394db5cc6c55173510e16a10ff6db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C294 10688 bytes

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