Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2b51e55f2ae788…

MALICIOUS

PDF

47.5 KB Created: 2020-10-25 23:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: da7211a0c7cc28c11e3840b52dc5d395 SHA-1: cd3a3e7cedb7246d27f48966d30585e0f14ae824 SHA-256: bc2b51e55f2ae788b571e3442085bc781fa084d28eaf588898aa8e6f76bc8fc1
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, suggesting an attempt to lead the user to a harmful site. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure indicate a malicious intent, likely for phishing or malware delivery.

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://ttraff.com/123?keyword=android+auto+communication+error+16+poco+f1 In PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/sazuzajonujoja.pdfIn PDF document text
    • https://pexazunawilaga.weebly.com/uploads/1/3/4/2/134265520/mimevanodagu.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kinufijozulof.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/kuzazonerifamim-siromoruwefop-nemojiweti-fomirozadu.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/e15f111a1112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5f8a970683bae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369922/normal_5f9154eb4f7f5.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/puxijidip-wasaj-tekurajosi-boxifebuwejefev.pdfIn PDF document text
    • https://lezaxuvetevomuf.weebly.com/uploads/1/3/4/3/134370754/4416281.pdfIn PDF document text
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/1801338.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4322/3209/files/diagram_of_the_heart_worksheet_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/3424/3749/files/qualitative_vs_quantitative_research_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8200/7199/files/tablet_coating_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8b3b1e9-25b9-417c-b528-38d5addc0863/52295258890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b165767-0c29-45c7-ae0a-9545759fee0f/jarav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7751/2597/files/sample_reinstatement_letter_for_insurance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8932/0867/files/31681070697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3123/3180/files/6809746601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/zikedefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7152/0411/files/riguwabupozixulukatotiwup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE9 5168 bytes
SHA-256: 9f53640b4f8e50956a091da9f34f70bac0b9024bba3aa3c7c497fba2a3a41e6c
font_01_sfnt_off00007d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D61 11352 bytes
SHA-256: 00889ed4136c23e8c8666ad22103d2c2d85f8e0632cf4a7e15ea059cdc6c7972
font_02_sfnt_off0000a270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA270 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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