Malicious PDF — malware analysis report

Static analysis result for SHA-256 c063b3713261ead5…

MALICIOUS

PDF

117.5 KB Created: 2021-02-28 21:35:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3cdc0e1b75b19f3a21bd53c01d647242 SHA-1: e0f8bc0397789825d1ce7ba0c2431e17567535fe SHA-256: c063b3713261ead58e9812e5ea7cc27ca6a6fafba74ce4f229b1cc24b953098d
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to a product ('Lotos ltp5000d for sale') and the wkhtmltopdf application, suggesting a lure. The embedded URL points to a suspicious domain, likely serving a malicious payload or phishing content.

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://vilenefex.ru/strik?utm_term=lotos+ltp5000d+for+sale PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369491/normal_5ffb06e979b8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404975/normal_5fc6a8b20d43b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384167/normal_5ffb31adc556f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465151/normal_5fc9bfb47975a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404490/normal_602784988917f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454575/normal_5fd7d683dacbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380701/normal_5fe0bc81a6983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469103/normal_600f1d416af43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496165/normal_60351e199580a.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/fukepez/vugexutejalomipidipa.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/whirlpool_duet_ht_washer_drain_pump_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/29656691857.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/44100903445.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/birthday_invitation_templates_wording.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/radimadigasixoneg.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_off00017c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C86 5240 bytes
SHA-256: fdbbe68908a33fe7142bd60217b8b8668291b16120f26de023ebe93c26546acb
font_01_sfnt_off00018e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E71 10784 bytes
SHA-256: 195f420693caebc03afcf697f1efd0f7f2ed45a320f9ddcc4667dbe4d98bd5a5
font_02_sfnt_off0001b384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B384 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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