Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d770172442e8a63…

MALICIOUS

PDF

84.2 KB Created: 2021-08-10 02:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3310f58e582d0bedc1fa49039b935bb8 SHA-1: 9c2060e13ecf6e82b28ef60c963c04b5f23cf7e7 SHA-256: 1d770172442e8a63b4bd946cef383e91bbf1be446adfc130f15997c75d4df56b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and other domains, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to exploit users by redirecting them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://wastran.ru/uplcv?utm_term=fuego+de+dios+acordes+natanael PDF link annotation
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4656a7bc8---69970116185.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/papedatolab.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/1c0a232236c7c647b7b01bab56212389/50131503857.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/6e0e3bc6f38b06121ef1ed05a6fee921/66183345444.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/45386380103.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/8486345423.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/84988987095.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/wajamigifutoxoxusubisix.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/zobewaxetusomemebisixo.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/xejakuwugalizibuxetu.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/833eedbf078ae8a550e57806a94036ba/gitaw.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/c67e188d4a4f22311a8b803bb580f9e8/18256610403.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/10519443974.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607524efc3f8d---95230622432.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/68982296141.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b46f2de134b---86298341020.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/be0ae51a89894a3a5dc3c816b0513446/gosovagalugobogutododoz.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/kevolojepuguzolovegemo.pdfIn PDF document text
    • http://capital96.com/userfiles/file/50249413424.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1fe766b783---55367013442.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/76543331808.pdfIn PDF document text
    • https://electroagro.es/pub/files/warojowudididitijuraxe.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/sefajisuzeloboxuteve.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/54780700578.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_off0000e19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19B 18528 bytes
SHA-256: ee40dd6d9872563e9829dd3a8cf040645578250710a7fdb069952b8baed57e67
font_01_sfnt_off0001105c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105C 10624 bytes
SHA-256: cadafb8675263d591ad3579c604b611c388ee0f8730f263f644edd6afc34ca47
font_02_sfnt_off0001288a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1288A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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