Malicious PDF — malware analysis report

Static analysis result for SHA-256 769c89b984e265bd…

MALICIOUS

PDF

76.9 KB Created: 2021-09-05 09:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: be6ac57b7be445bafc985dfe1811d390 SHA-1: cf247bd32f1ee1f3c9d388b27d1eaa78dfd2b1b8 SHA-256: 769c89b984e265bdd9e7f8d994791d99f6efbd4e85d73136cb6c8d61fb21b7fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://allytemp.ru/uplcv?utm_term=internal+environmental+analysis+in+strategic+management+pdf PDF link annotation
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/5dba18c1b052754d09b7c0dd3180c4ac/guwamovesipamemugez.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/sivaraxanasefu.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b04db2a881---bulabolilekivusuwez.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79b911d6a0---xuputezumabumu.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/56159247395.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c70b51d18cf---46982828756.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/93419336481.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/zopovemote.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/mqgv7idbhtsfq2n8bh6pps8vp3/337307658.pdfIn PDF document text
    • http://jongauger.com/userfiles/file/59565022390.pdfIn PDF document text
    • https://berbagiangka.com/contents//files/98358091373.pdfIn PDF document text
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/ditekirakiz.pdfIn PDF document text
    • http://bocghebinhduong.com/media/ftp/file/xidewigujofuro.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/16296743608.pdfIn PDF document text
    • http://alltechsro.cz/files/71732339693.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606f37f5d90f3---56968855282.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/hbmiau1e0o6epjbv711i1d8ih2/83517710767.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/80036041449.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/30679062252.pdfIn PDF document text
    • http://lecostationery.com/files/file/53534849223.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/0a05e7ead4bddd272400a334281a3a5c/13260010823.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ga2fvu4624t3nuv5uielf312j1/zelugitemig.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/86586766377.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785c3d29287---wigutitegawemikemokek.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d6d4268c8.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/93586988369.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_off0000c96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17D 16400 bytes
SHA-256: a90195f3c09499c51de89a6d8dab7250243b8f12fc19a338e0e9943319e6233b
font_02_sfnt_off00010bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB4 11096 bytes
SHA-256: 59c72a03dccf82d472e1e6eac10ef65b982440f88cd60678dfa350ce98492324

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