Malicious PDF — malware analysis report

Static analysis result for SHA-256 05de4c8b90ce9180…

MALICIOUS

PDF

85.8 KB Created: 2021-09-04 20:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3351277c1c84196949c9f198ebf394e8 SHA-1: 5357b335cf226151e4fb5da9097297c287d4f665 SHA-256: 05de4c8b90ce91800486dde89236e61bdf8205f936fe469b9fd44c1390a682b9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure indicate an attempt to redirect the user to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://www.lnk-creation.fr/upload/file/kusipaputulifalekan.pdf In PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/womifeberusikewel.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d6981a43458---79269379813.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/simafamanajudodavoj.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/jusisorofa.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/movuzokadijigerumegovotim.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/77eb937c453065f845d7bad266403c1f/79229023912.pdfIn PDF document text
    • https://dm288.rs/slicice/file/razaf.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210825093526.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723b350c3d0---63437979598.pdfIn PDF document text
    • http://halmar.info/userfiles/file/52685742802.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210717222222.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa40236f19a---xijezabatiwuwokazimovaze.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/woxobofajawebusemavuxol.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/osbjvbr5bdkr5cajgj291fl2m6/59151417314.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/ij0jndsrkjphtcpg2k1id4k5l7/36924724169.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/ekklvq6p1fpsdtkv5fdcn7b9ce/senajedukemafadegu.pdfIn PDF document text
    • http://fairway.cc/images/blog/file/78359704184.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/2e6856a33af91cd5474496e45d231e2d/55043486202.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608acafd3e91d---meburusavoxaxotox.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160abcb68b49e9---73778747230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=dulce+et+decorum+est+traduzione+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD894 28060 bytes
SHA-256: 8674ddc3281b9684b3cb3d640db122a2fbf9df8e03083cb06e78081ebe5e37bd
font_01_sfnt_off00011842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11842 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13059 10940 bytes
SHA-256: 98157c09de0a92a60d52f70a85160e5be89c267660f9448741dc63ff2090860f

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