Malicious PDF — malware analysis report

Static analysis result for SHA-256 66289d2c992279b4…

MALICIOUS

PDF

91.1 KB Created: 2021-02-14 17:46:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7cd29c8a74c2ae1ca4ff904a9119edc5 SHA-1: cd0d05655845cad836a436ffd28146806b06ae02 SHA-256: 66289d2c992279b412f599542f38f2ae2f1de936772789ee0863cdd78f29c5e2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and exhibiting link farm characteristics, indicating a phishing or malicious redirection attempt. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of external URIs and the overall structure suggest the document is designed to lead users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/123?utm_term=apex+clearing+vs+robinhood+securities PDF link annotation
    • http://reduslim-sitoufficiale.site/tikiromapawezozofidowymacb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481847/normal_5fe7b234b0283.pdfIn PDF document text
    • https://cdn.sqhk.co/kanereneb/YidShjj/best_rv_camping_near_park_city_utah.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5fd2ac8b97f73.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/ub31jc6/tucson_gem_and_mineral_show_2020_jogs.pdfIn PDF document text
    • http://experiment.website/bliss_verb_formm8lxr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417024/normal_5ff8cc4ae4590.pdfIn PDF document text
    • http://natfreshik.fun/prepositional_phrase_worksheet_for_6th_grade2k7lg.pdfIn PDF document text
    • http://abwaab.su/bdo_lahn_gear_guide_20205su07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500432/normal_6003d58d2f0fe.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/sgcETjj/super_mechs_hacked_version_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424328/normal_5ff2233b540ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446765/normal_5fed41022b847.pdfIn PDF document text
    • http://alcozerox.com/dog_man_book_3ffa5t.pdfIn PDF document text
    • http://naykaryadom.fun/etude_e_major_chopin_sheet_musicpqr8o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389568/normal_5ff4d6c033286.pdfIn PDF document text
    • http://shtampshop.ru/allahmme_ente_rabbi_la_ilahe_illa_enteu2k3s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_601a3e1b3be79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rapamed.epizy.com/application_letter_for_graduate_trainee.pdfIn PDF document text
    • http://tunadupiliv.rf.gd/87210606219.pdfIn PDF document text
    • http://veluvuwipigunuw.rf.gd/84433067216.pdfIn PDF document text
    • http://xakilapug.epizy.com/39201903016.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001253e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253E 5592 bytes
SHA-256: e503db74de6a414b3ad98ce12601266d026ce4e037df1536e248bffd7865c997
font_01_sfnt_off00013845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13845 11352 bytes
SHA-256: 4e5a70917b08fcd4a73335434a6741e371f821f2f4ccc3037e86d2b61c0d446d

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