Malicious PDF — malware analysis report

Static analysis result for SHA-256 69332edb876eb0f5…

MALICIOUS

PDF

44.0 KB Created: 2020-11-01 07:59:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 39df2b4ecd559cb6e9f9fbbeaca7b9ca SHA-1: 9381c9f2d9ce4fea86cd1d4daefb0f042854f79a SHA-256: 69332edb876eb0f55878edac34d23a61c69eb613a0ef9a92b0d5b342fafbae17
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=gravely+walk+behind+tractor+attachments+for+sale In PDF document text
    • https://galebekamabe.weebly.com/uploads/1/3/4/3/134305591/pimigagikibuk.pdfIn PDF document text
    • https://xurolimusogisuw.weebly.com/uploads/1/3/4/3/134395808/fa9a3057954.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/tuxovi-diluvapurenotos.pdfIn PDF document text
    • https://furifusopuwebe.weebly.com/uploads/1/3/4/4/134471692/3117269.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://uploads.strikinglycdn.com/files/060ca1e0-a33e-45da-b067-655baf44327a/fexulirutavegibozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c379b548-8b1a-4f4a-b5e9-72fa3195105f/68492778517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a27a0ecf-9c5e-4966-a113-2d7521849f00/bivudaxep.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/98267028259.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/42485780897.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/49878862115.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/bukeburigategesijoj.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/alberobello_map.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/20723987223.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_off00005ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF0 5540 bytes
SHA-256: 067fc30ba05aabfc5dd81d8d6be159195ba9d767d4075b11008eb88e4c00ceef
font_01_sfnt_off000071ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71AE 10324 bytes
SHA-256: 9d14457eb9a7739363e644f28a09a8dd07a2beae7a44c46f001819998cbbd074
font_02_sfnt_off00009520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9520 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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