Malicious PDF — malware analysis report

Static analysis result for SHA-256 37e4367417142a8a…

MALICIOUS

PDF

274.0 KB Created: 2021-07-20 21:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e4f23be25ba7c6dddb2d0f0313453bc SHA-1: 9dabc7e0c1567669d7c6ae1bff7e6508eb8ee8e5 SHA-256: 37e4367417142a8aa9e08414b1114df9214c838dada9eed97af8fd0311efdd37
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple embedded URLs pointing to compromised websites, likely intended to host and distribute further malicious payloads. The PDF structure and embedded links suggest an attempt to exploit users by directing them to these compromised sites for download, aligning with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

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
  • 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.
  • 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://anakmeong.com/contents//files/pexelozawugatekizanudoki.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/krr55fap9m4rht10h14bdqelkc/gafozovivulokipu.pdf
    • http://halongbaycruises.org/upload/files/puwimafiwarusupo.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/ad5c5105a45b7fd967c12de4f40ed32b/62745153196.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb2cab1f4b---geletasimi.pdf
    • https://stalbeckers.nl/userfiles/image/file/27603314762.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/sfp749r08lh4mv6cf6phmu1gk6/fivedamumojojovi.pdf
    • https://yuss.it/file/58175188313.pdf
    • https://vnsteeldetailing.com/UserFiles/files/52196069955.pdf
    • https://gomaihoa.net/upload/files/48660984947.pdf
    • http://bagumul.com/file_upload/spaw_upload/file/20210511202007.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4d29da0e9---17406396010.pdf
    • https://marblobaths.com/app/webroot/img/files/mejigunufeke.pdf
    • https://easresidence.ro/app/webroot/files/userfiles/files/leposebirofexawelizeges.pdf
    • https://bustotoronto.com/userfiles/file/dixavugagaxedak.pdf
    • https://al-farh-iq.com/upload/userfiles/file/76213368892.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/7f15cd1206b461586b0d324aa4cba98c/ligezojewatekumemimili.pdf
    • http://oletrans.sk/editor_uploads/files/zujuvelejajuzuletakodi.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc71b9460b3---ridebidas.pdf
    • https://loctra.net/userfiles/file/juvupifekalajusuf.pdf
    • http://unipsyclinic.com/userfiles/file/20210510055022.pdf
    • http://rmgoals.com/userfiles/files/puwovavonavapavozamirom.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=73rd+judicial+district+court+bexar+county
    • 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_off0003dadd.bin
738007ed02ad10a48c49d8f6ee4301dbfee1791e26447b5717bcdd66f99d0f93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3DADD 16912 bytes
font_01_sfnt_off000406f4.bin
3a4739014101593091e71b48cbd2d3fe42b699010932659c195a44b8e19b4135		 pdf-font-stream PDF embedded font (sfnt) at offset 0x406F4 11076 bytes
font_02_sfnt_off000420f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x420F9 16792 bytes

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