Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa378ec5f91f24da…

MALICIOUS

PDF

93.8 KB Created: 2021-06-26 03:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30d65ee0f76988aa78b51b0e1c75b76e SHA-1: 30e89f39a35506ed5c66067c585bd3613f82bf73 SHA-256: fa378ec5f91f24da1c430f63798a7a579705ddee25ee0eaf983066007e9d2ea5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress uploads and other disposable hosting sites. These links likely lead to further malicious content or phishing pages, aiming to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://crewmak.ru/uplcv?utm_term=how+to+cut+back+montauk+daisies
    • https://astek-telem.fr/userfiles/file/19405622073.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ee73v2nuckmm1e089at5qhfl8q/bolaralu.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e68a456d66---94874944948.pdf
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/4dce2a8b5d1d3774e1b357bc2fe80c92/levaluwikomafitufokuzeba.pdf
    • https://resonanceacteurs.nl/userfiles/file/vabopowedodeleputixenidik.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/2a5104909fcc83b097304b6573802af0/siketuviwakokav.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5a078a457---tekezuwogu.pdf
    • http://furniture83.com/upload/files/67657913774.pdf
    • https://thechoose.it/file/juxaxow.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dfe423dca---21189060048.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/fcdddac923ff91ba187cd2b01fc82b84/netemuxifo.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/bed51ebf4ad24cfaf2e7dad08cd8dc44/3973323317.pdf
    • http://bobas24.pl/Upload/file/82991679179.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096f6152c0d0---32894661714.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886d11d0c69---watumedurunade.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/a15a8ae4a60d991adbf4f1ce99c10b22/sesefuwoxizejezusaweli.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/c74qv3rh8uolk8qq5pc5jhlq92/22645684531.pdf
    • http://eia-edu.com/userfiles/file/33028629451.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/16d2106270cf8179864d03e5f44148b3/34918429024.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/gm3t2lun4g2rqeohehqc3u10o5/6642066737.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8a467ea69---71964489185.pdf
    • http://dissanna.com/temp/fckeditor/file/97413882401.pdf
    • http://mstreatmentadvances.com/userfiles/files/64470549189.pdf
    • https://hmanagement.net/userfiles/file/meluwamowezafit.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860c6753003---46702827150.pdf
    • 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_off00010af9.bin
936066c964492e09be2b9d228b7681c49da6ac3b997a91ee322122ab31dd31ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF9 17576 bytes
font_01_sfnt_off000138f4.bin
b5645d7acabb45e0599b65d121d13ce22b16cd529e6f770ce37acd7fefd12c5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x138F4 10792 bytes
font_02_sfnt_off000151da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x151DA 16792 bytes