Malicious PDF — malware analysis report

Static analysis result for SHA-256 928124dcb31f8c0a…

MALICIOUS

PDF

85.2 KB Created: 2020-10-30 03:06:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2e1604e6ce77d50bf88d4b830fd975dd SHA-1: db73c9584c39c0a16081fe8ba55b806c56ffd7ad SHA-256: 928124dcb31f8c0a59ae7543a16566df11607b5f7b55b91da1cabad580ffece9
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://ttraff.me/123?keyword=consonance+and+dissonance In 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/44f0d046-1c3f-4343-baf8-1b7270601e43/passat_b7_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/29810131830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9122223-0cdc-45fa-b885-ffea5a28c295/43825302275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e01c38-292a-4c95-9dec-03207664fb4b/27553688234.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/aplasia_medular_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/literary_devices_and_their_meanings.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/84881526680.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/parasitologia_humana_neves_13_edio_download_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/axioms_of_communication.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0736/1703/files/2342076448.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AF 4708 bytes
SHA-256: bbec30e35e15010d7e9a0716c4528ddff09b493bbb9323e9e27158fabf69c1eb
font_01_sfnt_off000109bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BD 12988 bytes
SHA-256: 06dd6a8a3d5f3d0963847db201f4ccf25d841d3253f5c5ee59a4adef9c3e685f
font_02_sfnt_off000132e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E2 16120 bytes
SHA-256: 46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12

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