Malicious PDF — malware analysis report

Static analysis result for SHA-256 5881d236385033cc…

MALICIOUS

PDF

78.3 KB Created: 2021-02-14 21:53:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ecb285b0f1aa8528eb9f9fffa8cef332 SHA-1: c81ef05290754b3c12a0044472b5755fc0405097 SHA-256: 5881d236385033ccf3163fee658ced5a527d6bcd374ab6f366d1bc45b80ea94b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection confirm the malicious nature of the file. The document body, though heavily obfuscated, contains keywords related to the URL, indicating a lure.

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://crophysi.ru/123?utm_term=offroad+driving+games+unblocked PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386837/normal_5ff98a0bd6a34.pdfIn PDF document text
    • http://gufutaca1.xyz/81749755766o3vm9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495241/normal_6011d959d3a8b.pdfIn PDF document text
    • http://fruitik.space/ayushman_bharat_hospital_list_in_bihar0l86x.pdfIn PDF document text
    • http://autokenn.com/90385123516g4fn9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370791/normal_5ff2afebba34f.pdfIn PDF document text
    • http://milanomoda-italy.website/epidemiologia_clinica_fletcher_5ta_edicionsn2fv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455890/normal_6015af745f74e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489725/normal_5ffcf78c542ac.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/woberiz/blue_tailed_bee_eater_information_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/wikukepiroriguvopiwivuz.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/platform_beds_for_sale_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/zevavovem.pdfIn PDF document text
    • http://kunivoji.epizy.com/eye_of_the_tiger_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/xumibawexe.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/bolivar_ferry_medical_pass_form.pdfIn PDF document text
    • http://jilawovo.epizy.com/calendario_liga_mx_clausura_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/hanuman_vs_mahiravana_full_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/87748172494.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD3 5632 bytes
SHA-256: 3a6823b6800d12b3055b65b496139cdeb80740f6f935093e5cc4308e4d0cb4ae
font_01_sfnt_off0000efee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEE 11396 bytes
SHA-256: 1599b780f4995b0249b923686b924554d6b34211e2b908b185e1e8c557c51475
font_02_sfnt_off000116d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D9 16036 bytes
SHA-256: bc1c1644e30597ae0beaac312b9749a82b64e26c109397326cdc67fdbaf2fe17

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