Malicious PDF — malware analysis report

Static analysis result for SHA-256 27af8f4fa6bc6f99…

MALICIOUS

PDF

80.4 KB Created: 2021-03-13 17:30:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f0b2eb8ce99d6f8c4acc77d8bfb8dbbb SHA-1: 4830d0452c65eaa4e59aa321dea525b67f3b2785 SHA-256: 27af8f4fa6bc6f990d679f68162ead3e4903c132ba3b49b68834d09ca15a4ed7
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL designed to lure the user to a malicious website. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of a suspicious URL is a primary indicator of compromise.

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://resalured.ru/award?keyword=transport+business+proposal+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4472768/normal_5ff7843a918a8.pdfIn PDF document text
    • https://gexurowi.weebly.com/uploads/1/3/4/5/134529019/7424447.pdfIn PDF document text
    • http://dokojekiferej.mygamesonline.org/on_the_road_full_movie_download.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/79422354326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471704/normal_5fd73a0d7133e.pdfIn PDF document text
    • https://delidanazej.weebly.com/uploads/1/3/2/6/132681463/d2aa19ce9938.pdfIn PDF document text
    • http://nituzovido.getenjoyment.net/does_raphael_rowe_speak_spanish.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_ca78a97b6fb3400d9d5f221fd0e52eeb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tomaxade/ambareesha_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f3bc320-3db6-484e-909b-1adc4aa9380f/nodelidejewakewafaj.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/queen_s_guard_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/how_to_calculate_pre_harvest_interval.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/663b400f-f46b-4359-a0e2-5da0978500c7/how_much_should_a_full_car_detail_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d693c2f3-0062-421c-94a8-421bcdf8f8ee/dominos_white_sauce_pizza_toppings.pdfIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_765e427b727446c8af68ecc0bde48d7d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/026f74c2-1290-41f9-a76f-d0a71c3953c6/71843968348.pdfIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_47b56e8488bb492b9ec6f69a4d48ca3e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/garmin_driveluxetm_50lmthd.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_off0000ff83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 5124 bytes
SHA-256: 01aebb0353bd1293299393330c6022266d5bf71df38feea2e78481ae4eb5d884
font_01_sfnt_off000110f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F1 10456 bytes
SHA-256: 9d6a7410d7182606aba053052a4300f0391dd0efc1a46ece31ad14878359e7f5

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