Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5cf5fb55ce2119…

MALICIOUS

PDF

69.5 KB Created: 2021-02-23 23:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c194937716a7a6aefa1f8b3bbe5a106f SHA-1: 24342f9c679c00f88ac8b8fceae3d29452106f77 SHA-256: 2c5cf5fb55ce2119925d916453dc361aaa095a5823a6f1ceef2085aa991bb40f
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, including one that appears to be part of a link farm designed to generate traffic or distribute malware. The document body, though heavily obfuscated, contains a URL that mirrors the suspicious external URI, suggesting a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=why+is+my+honeywell+ac+not+cooling PDF link annotation
    • https://cdn.sqhk.co/zawukomofise/jTPtyih/download_ringtones_for_android_motorola.pdfIn PDF document text
    • https://zeberafuduzugag.weebly.com/uploads/1/3/2/6/132682167/kobopob.pdfIn PDF document text
    • http://reduslim-shopofficial.site/dunkin_donuts_nutrition_blueberry_glazed_donutytxe6.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoletef/7jehdji/amtrak_fares_and_schedules_for_seniors.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/dojonuta/whatsapp_free_app.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/wimojutomuvagupujivunax.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/free_long_division_word_problems_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/86394653432.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/kopowumewozolago.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/capture_one_12._1.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/ps3_emulator_android_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/navuzapumerovomit.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_off0000d0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C5 5324 bytes
SHA-256: 6b73f050c3885c0b4318376286cea6f8978d4f53a4aeb8811914e0a6639a3dd9
font_01_sfnt_off0000e2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E0 11344 bytes
SHA-256: f9d36cef09bba58a0c218e40be8bf2644e28ac5ed99d8e72beb9135931c68b5f

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