Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc8461364e112722…

MALICIOUS

PDF

114.7 KB Created: 2021-04-11 08:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: af426bf3d57922d47f5db7d76e6b0d52 SHA-1: 22bb7027154c4d5c9fbd7167f099142705e43204 SHA-256: cc8461364e112722cb8f92cd047e56e089a066cbf399e232ea501190669551bc
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 URI pointing to 'bologen.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a children's book, which is a common tactic for social engineering.

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://bologen.ru/strik?utm_term=el+carcelero+de+filipos+para+ni%25C3%25B1os PDF link annotation
    • https://losulojer.weebly.com/uploads/1/3/0/7/130739206/6834279.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/gEhgeic/tipixirejo.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/J7ggDid/wanowef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408865/normal_601bfaef9863d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390383/normal_60655a821955a.pdfIn PDF document text
    • https://cdn.sqhk.co/wiparodub/wjeRE15/wajilev.pdfIn PDF document text
    • https://nurosizakudagag.weebly.com/uploads/1/3/4/6/134699554/sosiwowep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365575/normal_5fdf62d4dc542.pdfIn PDF document text
    • https://vaxokivov.weebly.com/uploads/1/3/1/4/131453734/kewonovomikogof_zavojokowujobop_vokivawazezusow.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/vufupu/wurisudamo.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/71116718466.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/when_should_i_eat_breakfast_to_lose_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dabb8d4d-85d7-49cf-9140-c3b675de3fc8/84660586709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19108489-c7a8-4b75-b0fe-9366432fd9ef/joduxozebinefimikepoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a8cf6d8-27a3-44ab-ad9f-a64dfd8ef89a/27616998829.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/chumma_me_chyawanprash_song_pagalworld.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_off00016916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16916 4248 bytes
SHA-256: 7b2e4523d642ec486c9d55ce883289937ebe65e0ac02503a43121d7f9e032c5c
font_01_sfnt_off00017825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17825 5316 bytes
SHA-256: fb6c40d695753d6432b6b1b16c097002e790abe964e8f090019adad84ca70a5e
font_02_sfnt_off00018a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A05 1712 bytes
SHA-256: 3e7a6094213c3841338e2cfb83a24323c588308b30473452378dc6f3eb9e8a32
font_03_sfnt_off0001928a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1928A 12736 bytes
SHA-256: ac4541c279d26ffa2904da110e7dcb228a75e4fed59764ce2045582da424156e

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