Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5d109484411fc4…

MALICIOUS

PDF

75.4 KB Created: 2021-09-01 17:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0945a572054e265b2c7025b93e99a92a SHA-1: d68c76af3be74be3f95c49a9fa9575d28f8552cf SHA-256: 9b5d109484411fc41804cc6aa8dfcb6b2326f81ab3124369f974edcd32772e8a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution vehicle. The document functions as a link farm, containing numerous URLs that point to external sites, some of which are hosted on compromised CMS upload storage. The primary attack pattern observed is the use of a link farm to direct users to potentially malicious content, likely as part of a phishing campaign or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://lescourailleurs.com/upload/editor/file/93880338871.pdf In PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/71146173230.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/lapuzeraboj.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/zunujipopexeboz.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c17246695fd---palufevofirimopareritupe.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/21895480102.pdfIn PDF document text
    • http://pevak.info/UserFiles/File/magisef.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160901ffed45bf---jazifuzikamugexo.pdfIn PDF document text
    • http://kahsport.cz/userfiles/file/japug.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/potilojedovulijolazowi.pdfIn PDF document text
    • http://www.parinet.fi/tiedostot/files/debogamedokijugob.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/33277606449.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/14d400cd146d316d6d7db40f63d91659/92931626125.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/16932827101.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/21702378781.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/sagasidojosulonedutatedi.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/zisewipusavoxiv.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/6ee96d6d254a8600df24cb763df52444/95713262712.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa1dbf0836---25719467995.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1997d2ad4---supebawovamik.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/tikodukavugofimasel.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///80567590131.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/10185446227.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=expendables+3+victor+ortizPDF 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_off0000c20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC20C 16836 bytes
SHA-256: 461f7979eb06cfdc4ae8f7575159e8b7d10c49ba1a62c63fd40c95b897c415be
font_01_sfnt_off0000ed7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7A 11032 bytes
SHA-256: 218ba9aab1dd76472338472be8e1f31778c6d88d47f87bfb31cdddb6e6f184fe
font_02_sfnt_off0001071e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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