Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cba4edc851a892e…

MALICIOUS

PDF

71.5 KB Created: 2021-02-19 14:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6abc4dfe36fc21b651990ce00f1bba6e SHA-1: cc3f57164935513a3a10059b2a4085c7837c244f SHA-256: 0cba4edc851a892e63f15b8ed7a05c12b23e631103ab57cdaffa09e2760ada3c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to direct users to potentially malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=tyt+9800+service+manual PDF link annotation
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/8001160.pdfIn PDF document text
    • https://cdn.sqhk.co/rakapuvad/gjVmjdR/cute_wolf_boy_skins_for_minecraft.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/jjjMhfo/idle_robbery_hack_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xusawikorut/lKDvifX/rev_heads_rally_apk_mod.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/645610893341qoho.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/iidDTjg/90798308394.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/SgeheuJ/gilikapuputobejizubi.pdfIn PDF document text
    • https://cdn.sqhk.co/jevikepuja/ihjgIig/castaway_cove_waterpark.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/ifmteZ2/lords_mobile_kingdom_wars_mod_apk_android_1.pdfIn PDF document text
    • http://rimka.xyz/rimas_asonantes_y_consonantes1603d.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/e2Ogfja/42071182910.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/juzowilipi/azure_cloud_storage_explorer.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/tornillo_sin_fin_transportador.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/19871972102.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/android_sdk_install_platform_tools_command_line.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_off0000d011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD011 5548 bytes
SHA-256: 3747d7d90cdcbfc5e3f8db3a3b99dff5a1cd0a56af6bd772ddbe6be9e08021be
font_01_sfnt_off0000e2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D9 14444 bytes
SHA-256: e426538f2244d4162c2df8c3e8f32d69d8c862570a40e8b256a9fc3e6b9eac8b

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