Malicious PDF — malware analysis report

Static analysis result for SHA-256 2488daa2292a4d04…

MALICIOUS

PDF

79.2 KB Created: 2021-04-26 09:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 82fc588fffe65de0c0d37d2869d49d39 SHA-1: de3f0f6abdf67355b1e825ca8311f96fd4810aed SHA-256: 2488daa2292a4d04d294c16f593cf5f47e8ba1ea4ebfaf319c4b13df51c35f16
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to suspicious or disposable domains, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to sites hosting further malware or phishing content. The document body, though heavily obfuscated, contains keywords related to product errors and file names, suggesting a lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=maytag+5000+series+washer+with+steam+f21+error In PDF document text
    • http://closemaze.com/demon_slayer_kimetsu_no_yaiba_episode_45fwj9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377414/normal_5ff679386a0bf.pdfIn PDF document text
    • http://tigixupog.22web.org/dazawe.pdfIn PDF document text
    • http://nebo-baikala.ru/what_is_the_best_home_security_system_to_buyya5bv.pdfIn PDF document text
    • http://douchehq.xyz/how_to_clean_lint_out_of_bosch_dryerx1rvl.pdfIn PDF document text
    • https://babanude.weebly.com/uploads/1/3/4/0/134017813/jatatokofonek_fobatajimajuruw.pdfIn PDF document text
    • http://idealica-ordina.site/toro_ccr_2000_primer_bulbb5k7b.pdfIn PDF document text
    • http://fozujam.iblogger.org/vocabulary_food_and_drink_worksheet.pdfIn PDF document text
    • http://bupetud.xyz/sony_handycam_dcr-sx63eh2jl6.pdfIn PDF document text
    • http://pedrons.space/nespresso_usa_inc_aventura_fl2lkdz.pdfIn PDF document text
    • http://edalovert.xyz/70952569556icppk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381091/normal_60209527c3669.pdfIn PDF document text
    • http://keluzizizeroki.getenjoyment.net/61362090901.pdfIn PDF document text
    • http://pexarinolal.mypressonline.com/78503281968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466398/normal_5fd7badf9a3f0.pdfIn PDF document text
    • https://zupevinar.weebly.com/uploads/1/3/0/7/130739631/wewolif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tagejenetel.rf.gd/emotional_freedom_technique_gary_craig.pdfIn PDF document text
    • http://luwefotikejumu.rf.gd/quimica_organica_inorganica.pdfIn PDF document text
    • http://pizuzol.onlinewebshop.net/osha_posters_required_construction_sites.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82A 5480 bytes
SHA-256: ef4cf8fb3ae7582e1e47570a4ec4a3bb64e32c337bfc1b1769f813eff0741586
font_01_sfnt_off0000faf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF5 10676 bytes
SHA-256: 25d4d31b1954651a6a53bee0cdaf723e8f7cf1a88007e67fb606986033c9e943
font_02_sfnt_off00011f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F56 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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