Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3749f926379c28…

MALICIOUS

PDF

86.0 KB Created: 2021-07-04 22:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa401fe49a9dc87849709b057e151662 SHA-1: 5510903193fbbe19c286aa11fd52a0369e897c1a SHA-256: fd3749f926379c2845647c79fb35319f2c8945ecc86104ae2142f715e13a22af
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to distribute malicious content or lead to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/funodeniguwikugorafos.pdf
    • http://ipceurope.com/assets/file/jewanawa.pdf
    • http://grabnerestriche.at/tareboluvavaweru.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b05cca1437c---wizazasizumewuzanesepibi.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7941cfe76503eaf698686038e0236afa/96910549366.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/7f97b3c898eb284ee49a5d2fc2b5b82b/depebovo.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/sbmnmhf9j7fm120usus0uk3ig2/94244810877.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/1d2ce708afdc616625f30b0895600b70/67326547048.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/6dbc9773637716367aa576e722714f99/62712149385.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e086c60ea7---15710777400.pdf
    • https://performanshost.com/calisma2/files/uploads/sajesabe.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607df712c9ddc---8008492592.pdf
    • http://aliglobshop.com/userfiles/file/vitavo.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/9132ca44464f3c9b163e059353910826/16831826189.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609301431a9c1---68456730701.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e621bd949f---21609770760.pdf
    • http://autowassenindex.nl/images/uploads/gugepejetiwokozom.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/e653d540a7850d806e8bad0880df519e/51692029256.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/061fd3fb5bfb5b80398a2603bc6fa185/87814033668.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5877953137---gudugokizule.pdf
    • http://personnelstrategies.net/userfiles/file/pomowobo.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb3125b6e1---pavomupozeronova.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/0ebe1328b31561b14e09913924186e04/miluteroxifuwix.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7c910d0849e059c6af06e527fc8d092e/wuwakejaziwowu.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607744b19e10f---pomigurukibetadenaravunu.pdf
    • http://studiocalcinoni.com/userfiles/files/likelobiridepevi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=best+free+anti+tracking+software
    • 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_off0000e86a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE86A 16792 bytes
font_01_sfnt_off0001007c.bin
d68f5165e3651e77baa49c538a9b58811c34518720ccaf9c7ce3ea6b616d934e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 19308 bytes
font_02_sfnt_off00013182.bin
3cdd5987cc259c569e11e6b6669c3f44c6d386d1641491c9bb4a4e408a9cb07a
pdf-font-stream PDF embedded font (sfnt) at offset 0x13182 10696 bytes