Malicious PDF — malware analysis report

Static analysis result for SHA-256 017e18b7225772f1…

MALICIOUS

PDF

84.4 KB Created: 2021-06-27 14:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2370e5eda7e15ca63c5dea0185080797 SHA-1: b99377abd0d9c9e0da89680502791b90432bf1dd SHA-256: 017e18b7225772f11c78c2f57bea31513adea9580846df96cde34c39b4c72d86
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites, likely for phishing or malware distribution. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160739f1fb24c6---76829502695.pdf
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/40661920981.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/65006291cb780c7538bf952936cb1a4e/94765128751.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b15c3161274---34643565491.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/b2f2ee90a4affa48d07041a7cdbfbcbf/70232038491.pdf
    • http://ecohost.ru/pics/images/file/37995600800.pdf
    • https://foulardfotografando.it/file/17275941068.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f13947d44c---16242367705.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/78c2b45c0a4c0194b5675962f89b14f1/75881283740.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/88e2621c878d44beab8e848da7dc66a0/vabelimalej.pdf
    • http://kaupa.cz/userfiles/file/36414466320.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d38279f24a---purorufajukosixe.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160807e5a68b7b---xiwiwuzosa.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29afd930aa---13541081478.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fe37a1d6d---xapojajipejutepamul.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/12684826e8729a112a45deda7de21908/fovujulaxejal.pdf
    • https://bmw-zona.ru/uploads/file/nexudinuv.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d32db74ad---rowepuvowaxa.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/bf4adr2q2p9dn0hl21gdvs78q1/mebiwuzapagefa.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2191f08cf---90678714004.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/46d9f6a8523f564c8b004cbeec883136/69736964485.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/oba2p10ogsj4bb17cu9ecqs2ir/goxotekunegipufiwaliw.pdf
    • http://www.salpasafarit.fi/tiedostot/files/4960318934.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=watching+my+naked+mom
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77a.bin
a32350555673bd87cd76ce33cfdd30bbb1905eeb8ba2afb965f969068c51c1bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE77A 17548 bytes
font_01_sfnt_off0001144d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1144D 16792 bytes
font_02_sfnt_off00012c64.bin
88a1033921598e77bda5e10da99ab2f24542facca24da7ef929d2bce6bac21c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C64 10704 bytes