Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace419ed8f6d013d…

MALICIOUS

PDF

76.4 KB Created: 2021-09-08 13:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 13d009d36504871c4accad5a4ac33d7e SHA-1: b14b2760796ef6dd90a0371320d066cd2d8acaed SHA-256: ace419ed8f6d013d7b5675dad6fdd8a2a5fbb11ede5cd0de3db3c6f805b9be93
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is identified as a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huntic.ru/uplcv?utm_term=gvd-6+vent+damper+manual PDF link annotation
    • http://vetusmeter.com/images/upload/File/8845020783.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/84836990976.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/47957138916.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/161375f51d5461---bufumevedatesovofuxebarig.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/mexojifirolew.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/6526007326.pdfIn PDF document text
    • http://paulgraphics.paulsfashion.in/files/domanukewuwezaxog.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/70769343752.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/46300489853.pdfIn PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tafijuxi.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/97275092656.pdfIn PDF document text
    • http://moneymaker-gold.de/files/xifugemifavogixitoxodizev.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/78201228471.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/62528051716.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/mewatutixixepoxazujaj.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/daziwinuxebalidov.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/ligobevavesapot.pdfIn PDF document text
    • http://travelport.pl/userfiles/file/ginek.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/mubomop.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/65702220912.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/tiwunigokifalazal.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a0fe6553b---lisetowifixox.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/dugatudejesigixug.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_off0000c695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC695 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000deac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAC 10580 bytes
SHA-256: dab3ed2beba8399a5a53a2a102c4953ae5d653709390970df866284a8b12412c
font_02_sfnt_off0000f6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DE 17216 bytes
SHA-256: 71e1992d2f59513825030816d27b1732f0abeff7eb5da73ef8847a5c388f9066

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