Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac0c53103bbf81d…

MALICIOUS

PDF

53.1 KB Created: 2020-11-03 15:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: fda79e746ca9ac9cfd32c8be948a60c1 SHA-1: d75115d5e0009c79aac44397298143218359134e SHA-256: dac0c53103bbf81d62a464371b68b683253d67751bb97daf15cfd21676984e0b
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://ggtraff.ru/123?keyword=the+bogleheads++guide+to+retirement+planning In PDF document text
    • https://depatimuxuzox.weebly.com/uploads/1/3/4/4/134404048/5cc67cc5d.pdfIn PDF document text
    • https://puvujoda.weebly.com/uploads/1/3/4/3/134326666/466891.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/misowesepatesize.pdfIn PDF document text
    • https://toxoxazagole.weebly.com/uploads/1/3/0/9/130969938/7385599d7.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/4450472.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/8123918.pdfIn PDF document text
    • https://foduzivanikatik.weebly.com/uploads/1/3/4/4/134492938/ropajodero-rovegolulu-zeviwivuxaf.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3731638.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://s3.amazonaws.com/jadudusujuje/47321646418.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/viwimujidalazufev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb490617-d985-437a-b3e0-42769896898a/rigexotupejokunoriwudes.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/broderbund_converter.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/samsung_android_mobile_codes_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aadf39a4-38ff-4842-861f-0d8e8b5874d3/neuroscience_fundamentals_for_rehabilitation_4e.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/functions_and_graphs_worksheet.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000767f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x767F 5344 bytes
SHA-256: cce839bc65e04409fd339cd7258abbbad0d38a2519809ca20dbd4e79749508d7
font_01_sfnt_off00008874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8874 3720 bytes
SHA-256: a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9
font_02_sfnt_off000093d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93D4 10784 bytes
SHA-256: e8cd0c86e40850dae5a98579ae764f6e674e28b158803fb962fba0fc55511022
font_03_sfnt_off0000b866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB866 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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