Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf4180081ed27da…

MALICIOUS

PDF

84.0 KB Created: 2021-09-07 04:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6550587da267105a70a21c99ff908e02 SHA-1: 767c86044407b4c1c27e3d949504d6a66ecc915e SHA-256: acf4180081ed27da2a88ed092afe49f3b2a8fe7bc16aafb89904b21f03008c3d
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to compromised websites, many of which appear to be part of link farms hosted on disposable or compromised CMS upload directories. The primary function seems to be redirecting users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://nomylo.ru/uplcv?utm_term=t%C3%A9mata+bakal%C3%A1%C5%99sk%C3%BDch+prac%C3%AD+upol+pdf PDF link annotation
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d4c5f8cfce7---tinebezakirijalubeseduj.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/6lnufe98g2uuhm4ni3md9hn18a/91720753419.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/79501259412.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/11qeh4qdql9hgp8j2oom9lugg1/66183292585.pdfIn PDF document text
    • http://trivio.it/userfiles/files/8862205735.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/11816258760.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/1b7a04a81ae589c310cc8d3faf7ea3ba/falip.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/lofuwolorukoremikuki.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160884db963e1d---banaraxodufiwakijatutula.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160acf1a910108---16975177974.pdfIn PDF document text
    • https://triosms.com/userfiles/file/vanekafubali.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/81bbfdddc9aae235d31a5c777736210a/78562611903.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/a3584628e2a89899e0914660e40f9f66/ladotinobikuvig.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd0d976ff9---fefusupev.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/3b6879d15d50856c7dd4abab652bfc93/zobexifulunebifege.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/fisodejuv.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/ruvikazufupixefoj.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c01e136a9cb54b21e1b71b7e27b3e7ed/kijaf.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/14394258524.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/tudebuzekufodalatojam.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/6c790c1fc094efc43ac8a34df5cbfb34/luzesilubavanekogiladinu.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/2743f199ff694c2770583fb2c4e0a493/wineri.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/28042193151.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/xitukupasapek.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b59fba80909---rulejono.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_off0000df0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0E 11504 bytes
SHA-256: df2f213efe516a51d7313142dca1a6d6bf4531e272ed3973def461533b185812
font_01_sfnt_off0000f979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF979 19236 bytes
SHA-256: 25501134e65dd865abcd2a381a59e037871b19aa5f97446f1dcd2db335655253
font_02_sfnt_off00012840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12840 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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