Malicious PDF — malware analysis report

Static analysis result for SHA-256 08df84d41b4376e0…

MALICIOUS

PDF

83.4 KB Created: 2021-10-10 16:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 3407f3e7842d7daa4208a984bf6afd85 SHA-1: bd446bd0fbe0ff062412872295162784f58d8006 SHA-256: 08df84d41b4376e05296c494451117ed247424b05104103f8fdc325c045c3335
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crysiq.ru/uplcv?utm_term=how+to+get+lifepod+2+signal PDF link annotation
    • http://studiofantino.it/userfiles/files/ziraludowozudupadijad.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/50cfce5a4005486a2098c57d6c8cd57c/situzuxumokuselub.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/jakevetekez.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/0fbtsk72pfm1ipnnmte8quj6os/95005982973.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/90039684403.pdfIn PDF document text
    • https://tempegaring.com/contents/files/bidifilima.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/q2s740ve3vt427t4jf0abtkm00/33692902109.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/mezixuridibeki.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/13434586734.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135afe8c8953---xideloxepubatowop.pdfIn PDF document text
    • http://dmkert.hu/files/file/28317969029.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/e04d96418a29334289595a9ca87b60db/18571006219.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc6aff2f0a---7575977149.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/47495147327.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/78a14601658970554f4547d5ac339575/3158057527.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/votogo.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/99817288457.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-3/20210903072137784964.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/59482655368.pdfIn PDF document text
    • https://yensaovinastar.com/media/files/41510750597.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/34110686961.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/furuzowufepesemoka.pdfIn PDF document text
    • http://chugguwang.com/files/fckeditor/file/64437594187.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1615a915d70ef5---59117879792.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_off0000dd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9F 18908 bytes
SHA-256: 292e3f72cee93fc864e39e49a2e693c874d1ca781cefbc54c6da7b15d7c91b2d
font_01_sfnt_off00010ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED0 10768 bytes
SHA-256: b8db96be819dae15646bf50afdc76725c29f97a6cfe4fdc312ea7a8f221b1037
font_02_sfnt_off0001279b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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