Malicious PDF — malware analysis report

Static analysis result for SHA-256 505bac66f908225f…

MALICIOUS

PDF

72.2 KB Created: 2021-02-16 01:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: eecd37d2cab2b3079a44683f0b1d053c SHA-1: a8a60ad492ffb5577276138300f99308c7b778e5 SHA-256: 505bac66f908225fe91f465f6f42708bb167d876a90c3ed6ab41598beefd70d6
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. The document body contains text that appears to be instructions for a tool, alongside a URL that is likely malicious. The presence of external URIs and the overall detection suggest this PDF is designed to trick users into downloading further malware.

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/123?utm_term=rip+curl+maui+tide+watch+instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376380/normal_5ffc2b5f11b72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477638/normal_5feeb9cc1adf4.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/kggZ2v9/dollar_tree_locations_twin_cities.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/igyjfia/crazy_racing_car_3d_hack_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446782/normal_602a9ea016d8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_60122816d98cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501962/normal_5fe803970dcea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496225/normal_5fcacb6c8514c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422168/normal_6006923b45067.pdfIn PDF document text
    • http://reduslim-eu.site/jizajakogireto725ql.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385434/normal_602554caa6985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420761/normal_5fd6004f4a31b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411511/normal_5feb7e53d25d9.pdfIn PDF document text
    • http://gratoraama.space/capsaicina_uso_topico3a38g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421335/normal_5fcf13a0066eb.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/bZX8ja4/90741459451.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/hehfgeG/xufubijujikefaxugi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_600c45758af66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411491/normal_60146d9daebdc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530910/normal_6000863c30172.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369769/normal_5ffcf0f6b5231.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB34 5412 bytes
SHA-256: cf5d8af9413e0f30acaca4a373a26978ef9f0a5204db6de13d8e568d32d86a87
font_01_sfnt_off0000ed85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED85 11096 bytes
SHA-256: 4bde75b3acbdb25d0dac31801e7391b425af4bbb666f4793b32bc6770456a0ee

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