Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee8d9514588f2cb…

MALICIOUS

PDF

59.2 KB Created: 2020-11-04 05:46:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7c8fd0a75f7b8d72b799b789abc12e12 SHA-1: be87bebe03430b8ee41b665118572b68789cc771 SHA-256: 1ee8d9514588f2cb471c2839f19a7b482c0e73e3af3984c0aadac0cf07b8e3aa
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 1.0000

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?keyword=double+homework+episode+12+free In PDF document text
    • https://lekinowi.weebly.com/uploads/1/3/4/4/134476644/8374332.pdfIn PDF document text
    • https://popilezofale.weebly.com/uploads/1/3/1/1/131164236/dobumowaf-tasapam-tafavizaxala.pdfIn PDF document text
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/bofitopuruz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418199/normal_5f9e71e916941.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/nesubine.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/menedo-fodizelusekom.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/kukazowox/madison_lane_partners_llc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e9fce8-0107-4a18-a9e5-c79858438696/47856857678.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/punjab_textbook_board_lahore_english_9th_class_key_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13842ccb-2293-4dc8-8435-14c26a0792c1/3479817095.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/56934948440.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/skyrim_tower_of_mzark_puzzle_solution.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/vepunara.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72EC 5548 bytes
SHA-256: 98b1127176869b1784b0e8269be24e44c96661d8c6e9aa8734460477c4d90c21
font_01_sfnt_off000085aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AA 7888 bytes
SHA-256: 1d845d84bf277c20db43342e7132c83ae2502643206f461425e2d559a205155c
font_02_sfnt_off00009f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F51 11308 bytes
SHA-256: 1c2b27ab487f5621cc994ae6190e018590696bf1bd99de39f197dba7022f51a3
font_03_sfnt_off0000c675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC675 17368 bytes
SHA-256: e326100053af578607488fb6c70be828d523e2dd8f99255f63ace4ce86470375

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