Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b5c12e147f51c9…

MALICIOUS

PDF

151.8 KB Created: 2021-04-03 10:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 80a0dbfae8a80aeee6d0d78809fa2554 SHA-1: 3d183aef4aa56f2b0ba6286ec187e045e99754a6 SHA-256: e2b5c12e147f51c9649b132f6faca26e9fddfcf221d9b83eb0eae5f65128d9cc
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or redirection scheme. The document body, though heavily obfuscated, appears to be a lure related to search terms, directing users to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=fairy+tales+stories+in+telugu+pdf PDF link annotation
    • http://zobebukore.22web.org/astm_standards_free.pdfIn PDF document text
    • http://kind-insta.site/79205706870kq1pg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393041/normal_6066da1022ec1.pdfIn PDF document text
    • http://specrazreshenie.com/can_you_use_apple_airport_express_as_a_routerq7626.pdfIn PDF document text
    • http://xuponigivixi.66ghz.com/55446884476.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/dell_optiplex_960_specs4m20v.pdfIn PDF document text
    • http://purpless.vip/nipurelavukazenanir31u6n.pdfIn PDF document text
    • http://about-central.com/86821332982wehxn.pdfIn PDF document text
    • http://igcopyrightforhelps.com/1094124206339i3a.pdfIn PDF document text
    • http://remont-pc.website/leneselifamlq0vv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455183/normal_600741bf4f30b.pdfIn PDF document text
    • http://getbuiss.online/classical_conditioning_phobias_workshvo93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462073/normal_6035ee871070e.pdfIn PDF document text
    • http://gramnews.xyz/74398199754x0whu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381997/normal_600bd7364613e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://fisiroxeriwew.rf.gd/bolabisukegiwapatidur.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/behringer_xenyx_1202_fx_send.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/79205060031.pdfIn PDF document text
    • http://mipuvofelope.epizy.com/muviposelakixelepodazi.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/nurelipusolozusip.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/700r4_rebuild_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/is_it_legal_to_own_a_lock_pick_set_in_ohio.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000188d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188D7 3044 bytes
SHA-256: f8c5ca536add25b5e2398ad42f9da1c91635fbd7183b4e495c68f0a5e00d5b7d
font_01_sfnt_off0001938d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1938D 5264 bytes
SHA-256: 571053ab73dbeb28cd8741b8a96a210957ec86f7fa9808d7890a646d273ee9c5
font_02_sfnt_off0001a592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A592 76064 bytes
SHA-256: 38d4f4d09d12dd1963290834c7b68e96be4af32bf13177e53d5011e35f7a98e2
font_03_sfnt_off00022a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22A7D 10532 bytes
SHA-256: 128ed43ac74c35f5bb09e5d21653f351bd98a1eab7164a509a8e35c2e7767538

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