Malicious PDF — malware analysis report

Static analysis result for SHA-256 8699cf17fbd365e6…

MALICIOUS

PDF

75.2 KB Created: 2021-09-04 12:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 031dfe61a136dc941db6834b501c7228 SHA-1: 051943ab0f865177ef01eb4da7986580e6cfbb90 SHA-256: 8699cf17fbd365e66a39999eda29b39e9b3b9a370edb970ae7ea724018930cd8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan intent. It contains numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to lure users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://thucphamtruongxanh.com/Upload/files/44408852745.pdf In PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/64dd60e2fd83aaab990fa6c8d55d62dc/15422230910.pdfIn PDF document text
    • http://mahnomenalumni.com/clients/879209/File/55887489566.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/mositisul.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/06/29/file/20210629_135623_183.pdfIn PDF document text
    • http://biomehl.com/images/content/files/6980677001.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/mepolanus.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e2ac0e1b52---68820837174.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c12b6b43db---todavekafuxesupibuwe.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/budaniminosowusujokagovip.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4fe41566d---gozalesefen.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/kitemurodudasibozebiwu.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/kuzevisu.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/877557cf638153e3789efe25202e71b2/zilexovoxozagifomik.pdfIn PDF document text
    • http://gabortech.com/admin/file/pekojigawaliti.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/lulut.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/kelobabawarirexujunatem.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/933f6162630422c2646aa09c977ff567/repizuvosapuviw.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/konanera.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/vitosonukelonoz.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/404af630a38cdcd5f75ef2073e06f11e/vivufowuxilig.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/37729666181.pdfIn PDF document text
    • http://beiks.info/public/file/dibop.pdfIn PDF document text
    • http://skupka54.ru/upload/m/59993197438.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=scared+anxiety+scale+adolescent+pdfPDF link annotation
    • 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_off0000c217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC217 16828 bytes
SHA-256: 7e566e661ddc963dd21f7280f9833aa34d15f6cf43027e28070bf8da5fad039a
font_01_sfnt_off0000ed3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3C 10904 bytes
SHA-256: db4be70884c1c48884e0a08b1a6329ddbb1cbd1f18cb9e8526595a5cca3ae8ee
font_02_sfnt_off0001069c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.