Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c2da9673cb949f…

MALICIOUS

PDF

96.9 KB Created: 2021-06-01 02:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e5af262217a97dee60eae6d1e36cd445 SHA-1: 5cc46b5a2d732e2c88a2a5c82915d7b55f65c334 SHA-256: 73c2da9673cb949f88c33233cf848a767a2c9ee9f957bf04c23ee77ec5811d52
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, and is flagged by ML classifiers and ClamAV as malicious. The embedded URLs suggest an attempt to redirect users to potentially harmful content or phishing sites. The document's content, though heavily obfuscated, appears to be a lure related to sheet music.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://archism.ru/pbw?utm_term=pink+floyd+atom+heart+mother+sheet+music PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450248/normal_5feb984dabd03.pdfIn PDF document text
    • https://gefumugizifoz.weebly.com/uploads/1/3/0/7/130739155/39d56738f5f662b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370307/normal_6018188239d0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425010/normal_5fe4a9b9d5eaf.pdfIn PDF document text
    • https://lonirukigosoz.weebly.com/uploads/1/3/5/9/135965403/58641e19f84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368481/normal_5fc63cea265fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_600e76313ee8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417308/normal_600c437b9a6ee.pdfIn PDF document text
    • https://tebeneka.weebly.com/uploads/1/3/0/8/130874559/2262560.pdfIn PDF document text
    • https://memarexegota.weebly.com/uploads/1/3/4/3/134366516/gizuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492575/normal_5fe803ab84c48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445106/normal_6021a474562be.pdfIn PDF document text
    • https://dizewipukuride.weebly.com/uploads/1/3/4/6/134615497/cd128681b6205e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499021/normal_5fc98bf29e72b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469827/normal_5ff667cd05a7e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144417405/sexotawo.pdfIn PDF document text
    • http://wuvebag.pbworks.com/w/file/fetch/144425163/backup_whatsapp_da_android_a_iphone_google_drive.pdfIn PDF document text
    • http://fufitiruw.pbworks.com/f/puwerigegu.pdfIn PDF document text
    • http://togusan.pbworks.com/w/file/fetch/144428451/pixel_survival_game_2.o_beta.pdfIn PDF document text
    • http://zelovoguvunu.pbworks.com/w/file/fetch/144424965/64331431509.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/xixufulaxonalivumaz.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CC 3704 bytes
SHA-256: 251b18547c3a3c85f09ff15f15e0bb973e896df5306115ccc5cab8f954696825
font_01_sfnt_off00013005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13005 5312 bytes
SHA-256: 12b383bf7b5daeb12d19619e7220cdbb16b30b715895144c9110a39818b8c11b
font_02_sfnt_off000141e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E7 11092 bytes
SHA-256: f190b7d0a21217f0f27918359b54c70f0f1d58a38fdf47fb5bd79dc9a512335c
font_03_sfnt_off0001679b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1679B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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