Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eeec796aae99d8e…

MALICIOUS

PDF

106.6 KB Created: 2021-07-17 03:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dc21e8d98cca1166483c55928c35ce33 SHA-1: 845c5abaf00da4ad53a131b1b1f0556293a17fbb SHA-256: 7eeec796aae99d8e197311ac351d329dd26920165f309dd757302eb24f9a2206
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attempt to exploit users via malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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 http://ttccid.com/userfiles/files/10011241338.pdf
    • http://beloezoloto.ru/userfiles/file/nubowafupovujifabi.pdf
    • http://csc0731.com/userfiles/file/20210614182339_af1gy9.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/a39bc5df98aee9f44786b76ba85608bf/58613655102.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160acaa615974f---zuwoxajifezek.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afe17aa1977---rixexesigafuweku.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160e4385d10511---pelaxozugigubut.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/6ec8d638b5eacaf2a12cfbbf00024161/vajirewamole.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/2acfb1eaf93899ae24925d7f4fce6147/guzivagexetukogutasinuzi.pdf
    • https://juvelyrikoscentras.lt/Files/file/61275719662.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/amgii0rr533r5n7hg5nkfa3let/menijugiladi.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a53e709c100---noxugarilizugojubijebo.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/47338dd2a497d3261629d0ed3c8c410f/12600026195.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/novetutivipolesaxikef.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bebbf2209d5---94965611630.pdf
    • https://yukkumpulgroup1.com/contents//files/61924173951.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1a2125a37---18222177612.pdf
    • http://www.europesolidaire.eu/userfiles/files/mamixu.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/4lerikehivt4snglt5l06j3glm/bafitananupeb.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/5574529c0349e2cde50cb8d4a84cd6cd/6518147779.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16097a267d9b69---nisawikuto.pdf
    • http://elcampoeco.org/FCKeditor/file/dologorirevifowiz.pdf
    • https://etonbio.com/newsLetters/images/file/zanejitixome.pdf
    • http://ahkjt.com/upfile/file/nodosi.pdf
    • http://hanboo.cn/Uploads/file/2021060520104270554.pdf
    • http://btc-ltd.com/upload/file/10429366299.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=the+pen+is+mightier+than+the+sword+figure+of+speech
    • 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_off000133bd.bin
6823b9066c8b53bc51a8397fc7a05f33c6eabb67bb51761ebdc8d351cf1a2876
pdf-font-stream PDF embedded font (sfnt) at offset 0x133BD 20908 bytes
font_01_sfnt_off000168ad.bin
6889f415e913c0a82f8ee56b4a39a35ecacd16dfbc2b652206cd1b4ffb07cb81
pdf-font-stream PDF embedded font (sfnt) at offset 0x168AD 11172 bytes
font_02_sfnt_off00018280.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18280 16792 bytes