Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4bf10b6d4509d51…

MALICIOUS

PDF

84.6 KB Created: 2021-09-19 05:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 56786d60df7597aa642ff5d73e6f8915 SHA-1: dd7d0c2a75b18a56b84dfb1cc364f6d6fe273b26 SHA-256: c4bf10b6d4509d51107a3d360c9e079c09f45e742293438075f3fbc2fed8c0f4
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, some pointing to compromised WordPress sites, suggesting it acts as a downloader or redirector for malicious content. The presence of a 'download button' lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/uplcv?utm_term=imo+group+hack+apps PDF link annotation
    • http://vom-ragnaroek.de/uploads/file/memav.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/fipaburunalidimozuvi.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/9913be67cf59f28e1999655d2bc036fe/56877010063.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/741992485.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/64022369625.pdfIn PDF document text
    • http://tabletopad.com/images/file/93221182390.pdfIn PDF document text
    • http://glassick.com/userfiles/file/lulapapefoxu.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/kopaxulolugafatigi.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/rugijejasimik.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/9916146326.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16134d840d5201---lanexasefezorabenulab.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/90157597016.pdfIn PDF document text
    • https://kolkataangikar.org/ckfinder/userfiles/files/20673262791.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/28257370415.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b03f230e68---14763703435.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/woret.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/87863153334.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/67108921535.pdfIn PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/14756341842.pdfIn PDF document text
    • http://sino-web.net/filespath/files/20210907185621.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/72908652031.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a47ecbd094---wilinupufalefebuvotuzo.pdfIn PDF document text
    • http://chapelguild.com/images/usr/mutotexala.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_off0000e4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFD 10492 bytes
SHA-256: 55b33509be9d1125a93b7c285f696024bc2a73cee59b1f65ba3c57faead66f0e
font_02_sfnt_off000114de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DE 18288 bytes
SHA-256: 28dce76d2d91ac554ac6d821046e5827241b21a495831cd070f246d42066f1b3

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