Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c9cb2db12c2de33…

MALICIOUS

PDF

49.9 KB Created: 2020-11-01 15:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 88edfdaaf7e26e4e0bc19676a190191f SHA-1: 2899b79d5fd30ad54bae5df532ac729f1083ebc4 SHA-256: 9c9cb2db12c2de3383a85d0ac699a57ec3eea0db29fcef01fe4ba22ddff0fabe
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file 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 3

  • 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.
  • 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=how+to+fly+hack+in+roblox+fe2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383449/normal_5f8d1a7048c61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f88767dceceb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392861/normal_5f986f08de9a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5f906f6ea4cfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5f9657fba40ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379846/normal_5f979895b81d8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vutame/varoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c68de3c5-b745-4ad6-b358-5f1972677245/75207435157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4996/7527/files/15197261995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2671/0169/files/56843990530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2295/6703/files/13471323239.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/93591253281.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/classroom_of_the_elite_light_novel_volume_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c32f66a-6e6b-46b3-b782-81449358f131/the_portable_jack_kerouac.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D6 5352 bytes
SHA-256: 7ee3f7d761ff0c4e9445f9274af8013236d14bcc64b376696211cfe9561c9b5b
font_01_sfnt_off00007523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7523 11844 bytes
SHA-256: 6b2dc87c48c93c4dc4a11c54ad59187d1ba1af1a56d2b164746e66b3b550a324
font_02_sfnt_off00009d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D00 18600 bytes
SHA-256: 55fa1d7dd08b11cd5307085b02da823fc9d62c19ac525390be2559b07d74227f

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