Malicious PDF — malware analysis report

Static analysis result for SHA-256 003c8e61e8780553…

MALICIOUS

PDF

74.7 KB Created: 2021-03-09 22:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2a10da279d5fe0fada1a51060bad7a53 SHA-1: 1da995e2af3745ba14f7b5ba476314effbd19e80 SHA-256: 003c8e61e878055392f7ac8af04ffb5a34397c55ecf45dfc153bc54b1e83b262
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. The embedded URL, 'https://zajinet.ru/award?keyword=etude+compar%25C3%25A9e+de+la+cellule+animale+et+v%25C3%25A9g%25C3%25A9tale+pdf', suggests a phishing lure related to the document's apparent subject matter. Although no scripts were explicitly extracted, the PDF structure and the nature of the URL indicate a likely attempt to redirect the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=etude+compar%25C3%25A9e+de+la+cellule+animale+et+v%25C3%25A9g%25C3%25A9tale+pdf PDF link annotation
    • https://cdn.sqhk.co/ralapogifur/bGjihcu/nilojapefalifineti.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/ifia8hj/28400060544.pdfIn PDF document text
    • https://cdn.sqhk.co/kixituvelil/DiiNugi/15040073522.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/gfHgehf/the_last_maverick_survival_pro_mod_apk.pdfIn PDF document text
    • http://nikupajosokob.22web.org/romeo_and_juliet_act_1-5_quizlet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b000f970-a071-4473-be2c-6d2d186bf889/kitchenaid_superba_oven_bulb_replacement.pdfIn PDF document text
    • http://gejulakan.epizy.com/98624573151.pdfIn PDF document text
    • http://mitijoragi.epizy.com/bsc_botany_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/byzantine_agreement_problem.pdfIn PDF document text
    • http://sugosabogakeg.rf.gd/83781941547.pdfIn PDF document text
    • http://vizepojuduw.rf.gd/zezemurulovowifegoxokove.pdfIn PDF document text
    • http://bixikaw.epizy.com/pixije.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/dezalovatakewaruxazujo.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/59774926569.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/stanley_500_amp_jump_starter_not_charging.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/toto_africa_choir.pdfIn PDF document text
    • http://fezesotufixodow.epizy.com/pefamoparidogubonavaw.pdfIn PDF document text
    • http://kugefosames.rf.gd/metallica_one_guitar_tabs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53b47c9-c7a0-4293-924a-7f35fa9abc78/what_child_is_this_greensleeves_piano.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_off0000e2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C8 5456 bytes
SHA-256: 52eb3de82ea8936cf170d020fa4f5635faecd378fafc1b237070b2e6d2792fdb
font_01_sfnt_off0000f50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 12020 bytes
SHA-256: ea70e88aa3e0a59608967c1b47dc76296eead1619a57ad2859de5da2e30c1a0f

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