Malicious PDF — malware analysis report

Static analysis result for SHA-256 94cc4818f398ef08…

MALICIOUS

PDF

57.6 KB Created: 2020-10-10 15:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9f14b3a1da28de4514bbc9f0184514b7 SHA-1: 2c894840876cfcfe4014cda6a9edd5fedd2ce67d SHA-256: 94cc4818f398ef08acadc1a49967e30a753888d45e455a17a90369ef996fee52
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://cctraff.ru/strik?keyword=como+hacer+un+compendio In PDF document text
    • https://site-1037096.mozfiles.com/files/1037096/goxofabagefososepov.pdfIn PDF document text
    • https://site-1037869.mozfiles.com/files/1037869/gewogis.pdfIn PDF document text
    • https://site-1043297.mozfiles.com/files/1043297/10636862333.pdfIn PDF document text
    • https://site-1037098.mozfiles.com/files/1037098/xaginuna.pdfIn PDF document text
    • https://site-1036821.mozfiles.com/files/1036821/bopus.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0437/5206/3137/files/84597792925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/beseg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/5324074048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9366/4953/files/2464559486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dae1f8e-9ce8-43a4-b1fc-893a9a8e327c/muwerubiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a7aa1ef-7a76-441f-91a5-14adfde81331/gozufux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4f4a618-3241-41c3-b016-3dc356a1f21e/bamakalejovosufuvon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3445d00f-3332-48b0-86a6-5d03387e4859/28915034321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0bf9e9-d670-4284-a762-c6fac5271f36/38374392060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f53c93-b48f-46f0-808b-e418a37f0bca/gavelatam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deaccf5f-3ce4-4bd7-a122-dcec6e9bab1b/zerudame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54adf1b-b907-4a66-ab1b-fdc8632a5e28/16279526685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/290d96d8-351b-4d40-9293-f2be0421aa3c/58824471079.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FD 1584 bytes
SHA-256: 7652a6638dfdc054fc2814e19b58f5803a6ba636aa8df9679524c2d79c9f0c71
font_01_sfnt_off00009205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9205 4928 bytes
SHA-256: 00893419f786df5acd31b7a5f469f0d2d980d133835343618c3e7a54af3ac506
font_02_sfnt_off0000a28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA28C 12008 bytes
SHA-256: 57555fe817a14ce0f943d68193adc70f47548aef555aca43afad9046124d5722
font_03_sfnt_off0000c91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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