Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e043c3772a6d8f…

MALICIOUS

PDF

81.4 KB Created: 2021-09-17 19:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1301eb399035b9d971ec78895b4c5057 SHA-1: 029c67825ea8dd2d29a2fab34a517d367d3067da SHA-256: 32e043c3772a6d8fc36a9ec19f704983f818a3627054cdbff6bf687f738041cc
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript suggests it may be used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sharon-barron.com/userfiles/files/kozabiwonabigudefes.pdf
    • http://gazetavk.ru/img/file/xevebulifez.pdf
    • https://melnikhouse.com/userfiles/file/jodetafukag.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/763026a22f25a42763fabb3d3d0822af/fegevisepodewafag.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2c67b9976---gerojufakamupepidovab.pdf
    • https://divanich96.ru/admin/ckfinder/userfiles/files/motukofomulukazosutuzoxup.pdf
    • http://xsjprinter.com/d/files/2769849469.pdf
    • http://arablift.net/userfiles/file/21705654489.pdf
    • http://turchifiltri.com/userfiles/files/59399622414.pdf
    • http://www.americaninvest.net/upls/files/19740137055.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/894d8f7e070f17be2818af101779f42b/69021481165.pdf
    • http://www.arborvitae.cz/ckfinder/userfiles/files/nivazozexatutadonefaraz.pdf
    • http://nawooelcs.com/upload/userfiles/2021/09/files/210905043318.pdf
    • http://ateliergermain.org/sites/default/files/file/57913599259.pdf
    • http://clinical-pain.com/pds/userfiles/files/zojigiwokog.pdf
    • https://afritransport.com/app/webroot/files/file/49637041482.pdf
    • http://eschool365.in/js/admin/uploadfiles/file/nejezanusojawetirune.pdf
    • http://anapharmata.hu/ckfinder/core/connector/php/files/jedalitazuxevitovedago.pdf
    • http://good163.cn/Uploadfiles/files/32644088467.pdf
    • http://reelproductionshd.com/userfiles/file/38881324282.pdf
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1631186310.pdf
    • http://homespakistan.net/magzine/uploadfiles/file/134840772.pdf
    • https://homestayhoian.vn/uploads/image/files/puxemotuj.pdf
    • http://katachizu.com/img/news/files/16241599865.pdf
    • https://www.meditech.cz/ckfinder/userfiles/files/69301697374.pdf
    • http://galerie45.com/userfiles/file/89517191404.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=cast+your+phone+to+laptop
    • 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_off0000d512.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD512 16792 bytes
font_01_sfnt_off0000ed29.bin
b0f7e6423b1a03279081cf882dcfbfa8d6da5bf161e7d3ec4c6e4e28ab55de52
pdf-font-stream PDF embedded font (sfnt) at offset 0xED29 10500 bytes
font_02_sfnt_off00010517.bin
2bb018d6d63ec9dc78319c8688e27e23010767a42343dfd90de00c2fe738f05e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10517 19660 bytes