Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d36b60a904b3e4…

MALICIOUS

PDF

71.9 KB Created: 2021-09-05 05:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 690bb75b755a653c47646555da8cbf46 SHA-1: 4a93a487fdc59ea924d6f3f0f4a7b25ad6ab8864 SHA-256: 64d36b60a904b3e458f30a96b983a37d431759cbf8b0fd01a1c891a59a18f25e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a large number of embedded links, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to distribute phishing or malware payloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ee64b16f395---87209200890.pdf In PDF document text
    • http://espokebar.com/uploads/files/51471829055.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c23edb67f25---36811052134.pdfIn PDF document text
    • http://samafb.org/uploadfilefiles/6759899578.pdfIn PDF document text
    • http://ipllaser.in/uploads/jafup.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b964b786187---gibutirenisomokawema.pdfIn PDF document text
    • http://yocarbroker.com/upload/ckfinder/files/33072409473.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a846182d520---48003685681.pdfIn PDF document text
    • http://landmanenterprises.com/clients/6/66/660ad4be7ac834282af30b44844c6003/File/43150844962.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/87969974680.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/9836281263.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/ximiwusolubanefavog.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161209e1e96e38---tafepusutiguzisejon.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/zoxexijufon.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/rezisanekogusej.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606f58f2355ea---zopuxonus.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/depiwevujepunikepo.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/mavugejamuguxunafuxomolu.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/xoridubakelibigis.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2d1baf9b0---6337212401.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/15964866928.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/62624408200.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=python+flatedecode+pdfPDF 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_off0000ba13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA13 16080 bytes
SHA-256: a08af282beacd63e456b208b4e2b994f916644e180f5a8a6fd073bb6397e8ef4
font_01_sfnt_off0000e2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DE 10472 bytes
SHA-256: 92b3ec487a59116345555bd0b99c38b04623241236769c97dabff3a288dbcc49
font_02_sfnt_off0000fa9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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