Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec8f1a171c286e4…

MALICIOUS

PDF

101.9 KB Created: 2021-01-09 05:29:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: eb842c199da5b455e7dfab404378d3ba SHA-1: 51934331d8b6ccbfc172cc509b66e87103b2a428 SHA-256: 7ec8f1a171c286e4cf3cb958c86b1985c44849e0ba41267a49297db2485ac4f4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged the PDF as malicious. The document body, though heavily obfuscated, appears to be a lure related to a song lead sheet, aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7570

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://trafficel.ru/aws?utm_term=till+there+was+you+lead+sheet PDF link annotation
    • https://rujovisaz.weebly.com/uploads/1/3/4/3/134328318/botuwebite_sanuxawet_dutalisalixo.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/jerab_nabikogujuf_budoxonal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_5fc1fb108132d.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/5519915.pdfIn PDF document text
    • https://laropavo.weebly.com/uploads/1/3/4/5/134585926/1812931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_5f9cc0bbf08c0.pdfIn PDF document text
    • https://cdn.sqhk.co/dumadomizore/Rjjgcgd/ice_cream_parlour_near_me_24_hours.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • https://uploads.strikinglycdn.com/files/af7da9ff-cda4-40df-a5a8-70e65c97bd4a/dv45h6300eg_a3_service_manual.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE409 18536 bytes
SHA-256: f7e1ea13bc6fa298e48af929f2bc4ae83d3b0294ad481f384311a24188d2298f
font_01_sfnt_off00011a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A81 5056 bytes
SHA-256: dd2f355e2bf6afc5b8e52ed8b31e2bfd6360548b492affe1805663868b050aa0
font_02_sfnt_off00012bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB4 2656 bytes
SHA-256: 2c7b51de253c1e5d764c3eb6a4d079cc07887bef63d15c28bfa41db4772d1a45
font_03_sfnt_off00013718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13718 11096 bytes
SHA-256: 9e9f4de15985a5d8c3267029f0ae5c23e23d150e0f9237425fdeab2f562c56c5
font_04_sfnt_off00015ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CE9 6712 bytes
SHA-256: f0e917344af2509517aebde29783356a479b8219422f8335bfa7eb8d86538869
font_05_sfnt_off000171fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171FC 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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