Malicious PDF — malware analysis report

Static analysis result for SHA-256 992b712b51baa72b…

MALICIOUS

PDF

87.8 KB Created: 2021-03-12 09:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9085b28d238c27871aff435959410d1a SHA-1: 4373f248235118666c64428038546c90c8ad7e7a SHA-256: 992b712b51baa72b9d83a1a5d3dc51e57fcacb51bb1d82124debfb926e78a38e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'alcoholismo causas y efectos pdf'. No scripts were extracted, but the presence of embedded URLs and the ML detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/award?keyword=alcoholismo+causas+y+efectos+pdf PDF link annotation
    • https://ditaziretuviki.weebly.com/uploads/1/3/0/8/130874055/wabasusunuvetu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500668/normal_602b981312882.pdfIn PDF document text
    • http://ladekepevij.mygamesonline.org/how_to_fix_a_leaking_refrigerator_water_dispenser.pdfIn PDF document text
    • http://bitalotava.scienceontheweb.net/55916078080.pdfIn PDF document text
    • http://penageli.getenjoyment.net/2021_lexus_es_350_lease_deals.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/ggjbUCb/61155960825.pdfIn PDF document text
    • http://kitixukizogutik.mygamesonline.org/esv_single_column_journaling_bible_large_print_bonded_leather_mocha.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_601712c390a22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_601b46b625d21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422382/normal_5fe268cc7895c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449629/normal_6038fa25d3cf0.pdfIn PDF document text
    • http://dafesoxexigu.medianewsonline.com/kirkland_9_hearing_aid_app.pdfIn PDF document text
    • https://xamegazu.weebly.com/uploads/1/3/4/4/134440804/860215.pdfIn PDF document text
    • http://wupozigujoruzar.22web.org/tifofijugaluparaxobanu.pdfIn PDF document text
    • https://maverutorolo.weebly.com/uploads/1/3/5/3/135393183/zifefovoku.pdfIn PDF document text
    • https://jekufagiz.weebly.com/uploads/1/3/0/7/130739150/b1d4c5de55e.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/C7uhgv4/70947080821.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/2c8ae636-de80-4787-8927-a1b5791036b0/5453534618.pdfIn PDF document text
    • http://zopezotudesod.rf.gd/kedalekisutelutakapija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6cd6b9e-fb06-4149-9063-390eb5a2a2c2/povijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5016ec18-9fde-418c-bf38-49598539ab33/how_to_start_a_reflective_essay_introduction_examples.pdfIn PDF document text
    • http://rotigenoxa.epizy.com/suzasakerevitewazokam.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_off0001170b.bin
8367e496ecbc8b079d41ef17641cde41dd91d38b2a0fdc52d8a22e57154270a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1170B 5392 bytes
font_01_sfnt_off0001294d.bin
88f0bd23ac911576a6d4988897ecb343871b2ebb30290f5fa79722065a6f0667		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1294D 12896 bytes

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