Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d3568d6338fcceb…

MALICIOUS

PDF

85.3 KB Created: 2021-03-19 13:50:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cf4817840fff3bb1b8ce9ce84f459a18 SHA-1: 9d0e0085aa7821a82a8cfeef5e0289d09aef674e SHA-256: 8d3568d6338fccebc39d38b976e9630d2f95daeaf10dc104a8c01fd470903b28
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. The 'SE_CALLBACK_LURE' heuristic specifically indicates the document prompts the user to call a phone number in a context suggesting a scam or technical support pretext. The presence of numerous external URIs, many on disposable hosting, further supports a phishing or link-farming attack pattern. No scripts were extracted, but the PDF structure itself is likely used to deliver the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://xezojetit.ru/strik?utm_term=engenius+ens202ext+hard+reset PDF link annotation
    • http://nopotaz.medianewsonline.com/96414100582.pdfIn PDF document text
    • http://kumaboperituf.22web.org/chelsea_fixtures_2019_20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422137/normal_5fe4f586c6171.pdfIn PDF document text
    • http://fipizilemuwob.medianewsonline.com/2020_toyota_camry_xse_red_interior_price.pdfIn PDF document text
    • http://kazotapojiwi.mywebcommunity.org/crowdsourcing_que_es.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499329/normal_6020bc6319973.pdfIn PDF document text
    • http://tomokatixo.mygamesonline.org/john_deere_la135_drive_belt_replacement.pdfIn PDF document text
    • http://vudifabofugejij.medianewsonline.com/vejujuvakofofupelu.pdfIn PDF document text
    • http://amandeepsadyora.com/bivituxabedijewedojechqba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498366/normal_6001cba84d6aa.pdfIn PDF document text
    • http://rankingcoach-seo.com/14698162295kngh8.pdfIn PDF document text
    • http://maska-respirator.shop/dowunude8y6bn.pdfIn PDF document text
    • http://theplafond.xyz/heaton_manor_school_ofsted_report_2018b6ad7.pdfIn PDF document text
    • http://welutotadaxol.iblogger.org/biology_a_level_coursebook_answers.pdfIn PDF document text
    • http://rinujajija.getenjoyment.net/machine_learning_vs_artificial_intelligence_quora.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/40260141629.pdfIn PDF document text
    • http://crystal-light33.ru/mail_formale_inglese_aziendanz547.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/how_to_pronounce_zao_in_chinese.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_4a75384ad1bc40689641c86cd7028552.pdf?index=trueIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_5a40eb5d3bb2468a88014027c4816148.pdf?index=trueIn PDF document text
    • http://fetekovabu.onlinewebshop.net/epson_xp_620_ink.pdfIn PDF document text
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_316d1fc7cf2d41478a947880d798d6a0.pdf?index=trueIn PDF document text
    • http://roxeruteruda.epizy.com/sky_formel_1_programm_heute.pdfIn PDF document text
    • http://kujidoxavok.rf.gd/breckenridge_snow_report_march_2019.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/negative_prefixes_game.pdfIn PDF document text
    • http://rolodumom.epizy.com/illusion_temple_mu_online_guide.pdfIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_73d6845bba5b4d98a56befbfe4f5bb61.pdf?index=trueIn 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_off00010e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E75 5352 bytes
SHA-256: 1117876d48145afd8309a155f60a4b9ada3fb5c580b53e61ab2f07c9a709dd09
font_01_sfnt_off000120b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B0 11440 bytes
SHA-256: 5c3cf9c4f96e99377fc6fc024753b537bc867348d9a39886bf68902330b6cd23

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