Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e2132edf3a948f…

MALICIOUS

PDF

61.1 KB Created: 2020-11-09 12:36:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6073ec82a5153525d1bf07f762d85ef5 SHA-1: 10442dfe915ff77e46d1c17d3efb767d3287abbd SHA-256: d3e2132edf3a948f99d9fd81b3979540b238d5f9a0b87db60693ac2b70bdabf1
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://traffmen.ru/123?keyword=forge+domain+cleric+5e+build In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425005/normal_5f98974ec8ccd.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/1018917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393791/normal_5fa481593ed36.pdfIn PDF document text
    • https://vuzaruluweketex.weebly.com/uploads/1/3/4/4/134478477/4538571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382966/normal_5f95c28e2dabc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f9147cc62dd7.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/1dc66850-8bb0-4c1f-aa45-8978d0ec2571/spokane_tribe_of_indians.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/astrology_books_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/holes_book_characters_main.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/46518060562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79655fa5-e909-4294-8dcc-3a31939d638c/2655313707.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/fairways_country_club_orlando_fl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/269db7b0-f9e2-4854-bced-62136be38470/redigubotuluvokoru.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000c04c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC04C 22352 bytes
SHA-256: ad4bf381d99407e907957a5a08acaefede4ade76e79d00e08b05a03587d23a88
font_00_sfnt_off00008a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A61 5300 bytes
SHA-256: 5d0089d6cf9a9b4fdf7b025e4f72a414fa979c59a981864c30d6470b114564d7
font_01_sfnt_off00009c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C57 10520 bytes
SHA-256: 6ff6bb78c9c70661024dac9f52e1927ba175d4031612b67bb0e9c95add7face0

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