Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c601423f060046d…

MALICIOUS

PDF

70.8 KB Created: 2021-06-03 14:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 859d6724b7f7d09ab3ebd65c7b43b2ac SHA-1: 28937e8ee73d1ae647404903aca8afee24f0b60b SHA-256: 5c601423f060046dc4f95e54986eec743bcb94a3f366fea8ab6a5709db7fc00a
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. It contains an embedded URL that, when clicked, leads to a domain associated with phishing. The document body, though heavily obfuscated, appears to be a lure related to musical notation, likely to trick users into visiting the malicious URL.

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://crysiq.ru/pbw?utm_term=jesus+bleibet+meine+freude+noten+orgel PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4482020/normal_60b3c173541af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413370/normal_6013bff560b2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499300/normal_5fed26de6caf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404500/normal_6003f0a57b06d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412159/normal_5ffd671242eb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417653/normal_606000ed39324.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448100/normal_5fdf724fc8cd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450896/normal_604a5f1ca2740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465396/normal_6037e715c8067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428331/normal_603dfae7a7521.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/9efb5558-50a1-45e3-a61a-63fa5aa8ca63/28988922374.pdfIn PDF document text
    • http://lulatigono.pbworks.com/f/how_to_reduce_belly_fat_using_colgate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aebea279-7dbb-4dc3-ac39-346c30e6f56f/goflex_home_login_forgot_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37da1b57-4db7-4ce5-926b-f8906459e281/65333050247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9e8ae6b-ff96-42bf-a8f9-86040b365c59/what_battery_does_a_ford_key_fob_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ea6679-bdcc-40be-9a36-35e2a67dabf9/77009245074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c39eebf-bd8f-45d2-8a93-4c72bf051232/mewupumuzetowolam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d63d01b-f52f-41db-885d-716f8b671c2d/perovifefulozife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f4ca95-8da4-484a-b583-09924ac8d4ff/vagufele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7f6a03-127d-442c-9e54-071d6e10584f/learn_small_english_words_with_tamil_meaning.pdfIn PDF document text
    • http://moxulolo.pbworks.com/f/65481790870.pdfIn PDF document text
    • http://tagexoba.pbworks.com/w/file/fetch/144422664/gozivix.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_off0000d4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C7 5148 bytes
SHA-256: 89457d76e8587ab3059d72c77d4e58b2f15dbd2508e74bb97265f6d5db1ee2ab
font_01_sfnt_off0000e62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62E 11480 bytes
SHA-256: 26e269749039b10fdf8f3386a18b2dfafe95c65f4970482f30c7fac3c6091f5f

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