Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e34f540796ab25…

MALICIOUS

PDF

71.0 KB Created: 2020-11-18 07:49:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 39098b60907c7c1c9340c4750dbe7a44 SHA-1: d5fe8a8cbf1cab7384674594298456be2a36dfc3 SHA-256: 53e34f540796ab252f74513d84b837550ca790e0e75f2ac52835f10c38348859
156 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 ClamAV and 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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/123?utm_term=smith+and+wesson+1911+e+series+scandium PDF link annotation
    • https://xemefotiri.weebly.com/uploads/1/3/4/6/134614789/pudod-jagebudoweke-jemonitev.pdfIn PDF document text
    • https://kusumuwuwudes.weebly.com/uploads/1/3/4/3/134338751/gezagujixoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401703/normal_5fb2911400ad7.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/2da27e7f-0e05-48d5-97c5-f8c4bb4393fc/kumowowojolevabusawon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b86d0356-d1a2-4c1e-b2e1-8782b47c9724/moodle_cw_edu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b2b1e2e-e476-46fe-a7bf-18ae85a06015/apprendre_django_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5429178f-a89e-4d33-8303-cd1787239105/haar_wavelet_image_processing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a65fc964-de1f-47a7-9a32-d2c02be66e15/download_nicki_minaj_mixtape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/999ca81d-edc3-40b8-b541-df168ed3354c/34353549384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0f322a-fa2c-45c3-9219-43bd989ef7b2/55142049953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ad2690a-4620-4a8e-b46d-91e0a7945f24/30180379115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79de419e-15b9-407f-a018-275df8ae4324/55517748736.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/pdf_books_by_rick_joyner.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 7

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_off0000c2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FB 5432 bytes
SHA-256: 3d0e8d9667a13e2b13153cae8de3387f8a11b1c04f43f825cd3f6adc690f68b0
font_01_sfnt_off0000d550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD550 16116 bytes
SHA-256: 2bf99bff928b8586b573cd4c6cbc9220e36d5551ab1bf0a1ddd7324fc2ad9b4d
font_02_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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