Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fcaf1087f755c5f…

MALICIOUS

PDF

76.6 KB Created: 2021-04-04 02:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aafd6a209d9a50ef496590c84c0b759c SHA-1: 200bc8737533a2e89dc6add44605f68cbf276983 SHA-256: 8fcaf1087f755c5fcd9f609e8c0c104e87ddabfc0f404004d8f4eed299cf7cb1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. The document body, though heavily obfuscated, contains references to 'foreign exchange rate worksheet' and embeds a URL pointing to 'zajinet.ru'. This suggests a phishing attempt to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/wix?keyword=foreign+exchange+rate+worksheet PDF link annotation
    • https://cdn.sqhk.co/kinanekoxo/YTOgep0/french_nails_and_spa_cranston_prices.pdfIn PDF document text
    • http://keto-s1.com/painting_cabinets_with_chalk_paint_and_waxt4r3t.pdfIn PDF document text
    • http://vekvelo.ru/guvotikogusedusifq343p.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/u6LgdNr/65889061753.pdfIn PDF document text
    • http://1xbets-regs.site/xanonabowojowekufikasotl4p80.pdfIn PDF document text
    • http://familyit.info/platform_beds_uk_ikeadyp7m.pdfIn PDF document text
    • http://artemk.ru/23485888901rgyav.pdfIn PDF document text
    • http://bigtittybella.com/flexconnect_local_switching_vs_central_switchingl90y9.pdfIn PDF document text
    • http://lnstagramcentre.net/niteguviratiporetilatoc6ukh.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/jolunenafobuw/51100256888.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/31227842022.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/vakabejoxiniw.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/dukuzikometivaxuzovatel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523b7994-c124-4161-8bc0-eb664f1bfd35/xenoxivav.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/pokemafifeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc4abb4-81cc-46ee-a6ae-b82c83e31948/fedep.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/how_much_does_an_amazon_warehouse_specialist_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8de9ff8-3e95-4dfb-a95d-bee718c93e75/what_is_a_fellow_colleague.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/mandate_form_meaning_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07de58a8-469b-47a1-ba7b-c725d4afb124/gravity_and_friction_worksheet_lesson_1_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/kenaxixekuforazit.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_off0000ed59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED59 5208 bytes
SHA-256: f41bc8d9f7431f3a37e19371d9f4ce08f5bc2c19ba55c4a57e2776db5c18821a
font_01_sfnt_off0000ff25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF25 10728 bytes
SHA-256: 94378e255415b096be4d5b04f1dfeb706f4866da25fb5bd6d2b89b87857e1486

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