Malicious PDF — malware analysis report

Static analysis result for SHA-256 829611dc5bda34e0…

MALICIOUS

PDF

114.7 KB Created: 2020-12-03 22:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 97fcedd98fd8c1d3048eb46aeb828b90 SHA-1: d7ab98bb20f8ef0868110170455307da2ebb7dda SHA-256: 829611dc5bda34e07e44238efa45316817fe548188b189380bc8a1c54da0755b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=dragon+ball+super+broly+english+dub+release In PDF document text
    • https://xiwapidijiz.weebly.com/uploads/1/3/4/5/134511693/logovido.pdfIn PDF document text
    • https://wejapofi.weebly.com/uploads/1/3/4/5/134590092/sobevulatonax.pdfIn PDF document text
    • https://simejozegedofu.weebly.com/uploads/1/3/4/3/134359486/jefawovovad-sozezeruxinelax-doseluziwe-demarifofura.pdfIn PDF document text
    • https://fiduwovizeget.weebly.com/uploads/1/3/4/5/134517619/tomipi_bidan_delikapiliz.pdfIn PDF document text
    • https://pepomujotopulog.weebly.com/uploads/1/3/4/8/134873529/niwitilu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1057a3db-d287-4ac5-9dd1-cedb0e320231/indominus_rex_ark_spawn_command.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0918d5f5-e907-424a-8182-9f608d3a4cb2/fundamentals_of_game_design_ernest_adams_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14892f9866f3fd2d6f995/t/5fc73b4ab2fa4660c8d033c8/1606892363890/1400980911.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc301a1cd1e280355e1eeb1/t/5fc4df23f3de5e49b5fe4594/1606737699867/30884848443.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbf0116eb00e3c4bba69/t/5fc1baabeaf37e3b64dcd472/1606531755707/75127341490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeecbd02-5320-4e24-a99e-13d454750481/fabud.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe03771972c46e3c65ed70/1606288253389/59410358945.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53aa03398ff75154a37f3/t/5fc7d3b16d2b7b26a14daa9f/1606931377552/download_ping_pong_master_mod.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_off00014f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F27 10664 bytes
SHA-256: b0f7d829cc9242f872a8724b8648b2da237c862df5d33e991bcf60944a4e03cf
font_01_sfnt_off000171ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171EA 5464 bytes
SHA-256: 90d26baff9aa7e77828487908589c0b0e9068581d224c11c47e116b94f5f5a9f
font_02_sfnt_off00018471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18471 2140 bytes
SHA-256: 49dddaa543544930169c80d10742cf71a10a90771d945bdf421e53748b1fa594
font_03_sfnt_off00018e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E4B 14648 bytes
SHA-256: 7abf339740aba382aefa3d2a9df54652c4a0d9ec66c9c8493a68efafde516d51

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