Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9293e3f8da32b35…

MALICIOUS

PDF

78.1 KB Created: 2021-03-29 03:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6491ba68a423a0e55a925cbac7a2e1d6 SHA-1: ccf72251bfda09bbfe716f2b1b813790bdce32ce SHA-256: c9293e3f8da32b35e64a0f199948a45dcd03a4a546958e0e8cb564cdf827eabf
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high-severity heuristic indicating it's an image lure linking to an SEO redirector, specifically identified as a free-download phishing attempt. The primary malicious URL, https://mezovuduw.ru/wix?keyword=busn+8+pdf, is embedded within the document and flagged by multiple heuristics. While no scripts were explicitly extracted, the PDF structure and the nature of the redirector suggest an attempt to deliver a malicious payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://mezovuduw.ru/wix?keyword=busn+8+pdf PDF link annotation
    • https://dawudetunik.weebly.com/uploads/1/3/5/9/135972975/navis_sogazulezojiwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465685/normal_5feea7f6490ec.pdfIn PDF document text
    • http://ponemofetu.scienceontheweb.net/bahaya_merokok_pada_remaja.pdfIn PDF document text
    • http://tvoyoproc.fun/98565740621ba884.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483338/normal_5ff517b4b3110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417128/normal_6041c1fa4d136.pdfIn PDF document text
    • http://filuxunokenobud.mygamesonline.org/14181801269.pdfIn PDF document text
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/8613685.pdfIn PDF document text
    • http://msertis.xyz/bella_high_power_juicer_manual0usak.pdfIn PDF document text
    • http://argo-tourism.com/jorafabitabagunefikesin2yal6.pdfIn PDF document text
    • http://matrixbicycles.com/journal_ledger_and_trial_balance_questions_and_answersk7v5p.pdfIn PDF document text
    • http://giocodigital.fun/circulation_aha_guidelines_2010s8vg8.pdfIn PDF document text
    • https://lurekoba.weebly.com/uploads/1/3/4/0/134018443/2992b7a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/food_handlers_card_test_answers_oregon.pdfIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_eb773efd947141a2afc51af26df44008.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/81156871386.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/bodenheimer_jurisprudence.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/garmin_forerunner_305_manual.pdfIn PDF document text
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_fd94956cbb81463e93e54ca3584e76bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/comparing_decimals_percents_and_fractions_worksheets.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_off0000e959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE959 4940 bytes
SHA-256: 43eeacd6f8f5ecb452e7e414042f1a3599b621756db18f94ca0fc888ea98cd89
font_01_sfnt_off0000fa47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA47 15040 bytes
SHA-256: 6e9728a2486b046b89df6dab48463f7c7adce23e6e1ef6e4f0f842f09cee58be

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