Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f93649163ffa548…

MALICIOUS

PDF

79.9 KB Created: 2021-05-30 08:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1ede23d5f1982234b86e1ff81a6b615 SHA-1: c4860dba184cd33b92a0fc781aeb278bcd56778a SHA-256: 2f93649163ffa54889577023df7db662d2f79a55ded225d9dc5c61999443a03b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/bns9g17qqe88m2ploaf283ridh/mosiwefelew.pdf
    • http://madmojo.com/fckupload/file/19468822112.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5c04b7abd---tunikonemupuvewugofirir.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/6rlnmrten1d7lprln4ap1797u5/51639594114.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6c98b5716---78671494761.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/b6c881d0a9c8979b81b6106ddd96dbd6/86455519379.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/1grsi2hr8q4d6cdvrosqkmoopf/jojusara.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/70d805f4ab6d8c15be1617bb00064819/75466474885.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/8cdb7cc3b5933d9817f5c407fc77fb5e/65020847921.pdf
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/be5afb1c13b7bef1f92528170dfa41a8/11114565551.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/92aabddc17db6939a9c40c383ed535fd/97978297051.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2161bb97c7---62349425242.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/93329270b20bb7cbf3fce951a0834735/tapawifadoxe.pdf
    • http://akkoryazilim.com/userfiles/file/kigewabuweputibegowudite.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0752d857a---zuvetinonumasono.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082e35f3dc09---50119642840.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=what+is+certified+administrative+professional
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efbb.bin
7bd1b12a936c1b39986b076f3188cbfd3085df619b2ea49f694abc8ff66ce9c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBB 5468 bytes
font_01_sfnt_off00010233.bin
7f38c7bd3076d5ec567b373f8788658f617417f44aeaffad1c2d563936ecbb0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10233 2268 bytes
font_02_sfnt_off00010c43.bin
b2fbd2670d7cb411593be93d71b93cf30c1386cfded0ff9087bbf0c693cc8b43
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C43 11188 bytes