Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c97658320f03aba…

MALICIOUS

PDF

103.4 KB Created: 2021-05-02 15:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 043f5b94a2b113aea010bc13ff302d42 SHA-1: b3572a6685aed88ae802b1c336c6fabe9425ca0b SHA-256: 3c97658320f03abaa5dcf7d6b1157af61888fc785a16af04f5b49b9b5eb74c51
96 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://resalured.ru/strik?utm_term=is+the+canon+t5i+good+for+video PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383131/normal_5fe0c398c1211.pdfIn PDF document text
    • https://kobetuditi.weebly.com/uploads/1/3/4/4/134446504/tajiragikosekovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491148/normal_603e4c4764967.pdfIn PDF document text
    • https://pesilanolaz.weebly.com/uploads/1/3/4/3/134330173/a6df7f.pdfIn PDF document text
    • http://getcreditreport.info/use_ps3_controller_on_ps4_hacks3p6o.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/rrhgVhh/cake_ideas_with_fresh_fruit.pdfIn PDF document text
    • https://bumiwawewa.weebly.com/uploads/1/3/5/3/135343946/8043629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415291/normal_6047f7103b147.pdfIn PDF document text
    • https://cdn.sqhk.co/tesolivu/hgREThc/15512686159.pdfIn PDF document text
    • https://cdn.sqhk.co/wenejusuzixe/hjhqjcT/brain_toys_for_dogs_amazon.pdfIn PDF document text
    • http://yourcy.com/web_hosting_services_tutorialspointa9lnh.pdfIn PDF document text
    • https://cdn.sqhk.co/paxajirawegu/jdrgjgg/49486711475.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405185/normal_5ff68023e23c6.pdfIn PDF document text
    • https://javesuput.weebly.com/uploads/1/3/0/8/130873829/e33a7dd98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462035/normal_606cfe72dc7ac.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://s3.amazonaws.com/genukopapovixo/how_do_i_use_my_lumix_camera_as_a_webcam.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/2153986152.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/kijirijavolokuwilodiwoje.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/nakawujiwigetedikitavawij.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/tobakamubale.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/clustering_algorithms_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/21931935715.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/17063539503.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001490c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1490C 5160 bytes
SHA-256: cd44431d3b54092b14a59f5e0af0646e454f7a3a2b83848d8bd1408b9d62ba98
font_01_sfnt_off00015a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A95 11140 bytes
SHA-256: 4ae937d49967e7d88c22c98ff92a17de99ce5346664773258afa96b513614e4e
font_02_sfnt_off0001805c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1805C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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