Malicious PDF — malware analysis report

Static analysis result for SHA-256 19292dd34a8fa966…

MALICIOUS

PDF

89.1 KB Created: 2021-08-18 07:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 661e701963b155c3fc25ec543dfc3be3 SHA-1: 190030f20c50a5bb36f0db5b39bc09c99ac2aa03 SHA-256: 19292dd34a8fa9665e0d710413d60c67234bf2add2a1192e724173cb61cb957f
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the links and the PDF structure indicate an attempt to exploit users through redirection, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://anglarill.net/userfiles/file/66091638523.pdf In PDF document text
    • http://phsbulldogs1966.com/clients/8/87/87911cb64b10f66d93d15f7b6e22d365/File/24933310360.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/4097806814.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d72e9b11dc---befimasaxixerebumajifev.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/df9137fabe558c6a3e5171f3afd77a2f/vudobisosut.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/62175066179.pdfIn PDF document text
    • http://cn-noah.com/uploadfile/file/50738435469.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/jalesuvumomokibiziro.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f4651cb62---zafomixuxoxigakun.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///vuxivef.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/sufajewebukoka.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/tozudaroru.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbc3af3262---nitonaz.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160edb5fa7d997---dovugujativeb.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/kumulufujab.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2c3b3dc14---85891624702.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/06a5bf6f2de34c0a2ae506ff776f9f83/kijaratiruge.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/46964721327.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/cf898a02260f6bc3be0a5cbfbaceb01d/nejipepafereso.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/420fa05123293fd2112f3149ddcf1d52/tekumumotoxinufezilamada.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/566bbf2b976551018c66fecc26e5ea1d/vesokalu.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607684c55b9d7---6772227538.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/19666181316.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104b2c9c7f03---kaper.pdfIn PDF document text
    • http://genarchi.com/data/temp/file/1166049545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=where+is+the+oil+drain+on+a+craftsman+lawn+mowerPDF 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_off0000f5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDD 17076 bytes
SHA-256: ccfe166de8ee153a235ec0ddf466bd5c82654a2aab5f1df9ac90115d3ec8af6c
font_02_sfnt_off00013a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A7A 10820 bytes
SHA-256: dbc9aebbfe718301b82893971ffa0ad2a84bd331e7d56c41bef651bbad66701c