Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa807212ab644170…

MALICIOUS

PDF

87.3 KB Created: 2021-10-21 23:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 2729f6fcf3fc08b71165405ba80ec70a SHA-1: 69586914da65ac94372672c6afb14ac7e38fe25e SHA-256: aa807212ab6441703449a6d6668cd1b0dddb5687820be9abcacf8fc0fd7e3ff5
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to link farms on disposable or compromised hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection or further payload delivery, while the link farm structure is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://goozzl.com/userfiles/files/90630429718.pdf In PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/91322408566.pdfIn PDF document text
    • http://video-cycling.de/files/file/10335537563.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/25049570856.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/08bd21860d755f10d32d47fdfc42440b/89281696758.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/88252095340.pdfIn PDF document text
    • https://korankertas.com/contents/files/31209127461.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/22553919446.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/sazuduji.pdfIn PDF document text
    • http://cukrarska-vyroba.cz/UserFiles/File/67807391447.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/jodomotinigegaxasep.pdfIn PDF document text
    • http://citty.org/images/uploads/file/wofafibegov.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/56631272997.pdfIn PDF document text
    • https://chachachat.info/js/ckfinder/userfiles/files/18131097624.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/58122544721.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614572e9206de---lukerajezakobeworadudi.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/37518744928.pdfIn PDF document text
    • http://tasfor.com/files/galeria/files/84404869843.pdfIn PDF document text
    • http://gdfsztal.com/uploadfile/files/81873365496.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/s7s703ksejldcpljpubt7lj4j6/numiporufoxame.pdfIn PDF document text
    • http://kleinschadenexpert.com/userfiles/file/1335775893.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/getafitazewum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/UsNeCLCzgYg/uplcv?utm_term=top+chinese+importsPDF 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_off0000eca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 10396 bytes
SHA-256: 8f04a4faaac29eab12622a4e6273ba4ef1c7602e2a48ae8093b5786cf3b968bf
font_02_sfnt_off00011c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0B 19724 bytes
SHA-256: faf3fce7d5589bfd4d0c5f489390b194015273272dca3a724e94b2357ba17239

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