Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c90cdd9cae2a13d…

MALICIOUS

PDF

71.4 KB Created: 2020-12-01 12:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8cbde914abf6cc1fddd3b3081520eba2 SHA-1: 23885b4c39cb16e7698b5b4a056b84093ccb1a1b SHA-256: 0c90cdd9cae2a13d9359a319ee300280021467efe1b6aca7d9ad872c8a429d50
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 0.9997

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://trafffe.ru/123?utm_term=raspberry+pi+video+player+os PDF link annotation
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/4290719.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/9276785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5f8b695665357.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/5331218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407756/normal_5fb72d1031966.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/zefomojozur_gegip_mereve.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/c86978a2-d31c-4ddf-9838-165643b37719/gubuwidekajupopufatomat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/561c5b25-8df0-4e54-9fc0-fbf4c4a55951/jhene_aiko_songs_free_mp3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/29168913063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80439f86-afc8-4798-ac2b-7df84e786a24/wumusitoritevus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3da3a551-006e-4718-9f82-e10b7a3d8bb7/zavivivamadimegov.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_off0000cad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD5 4864 bytes
SHA-256: c693a20579d9b5f635abae4913b0782219442efa10df066627eb8b867a3a10dc
font_01_sfnt_off0000db71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB71 11044 bytes
SHA-256: ee2d1b8f85cdd881f1ee805629d73aac027bf07447c6daa23f7c087f08779ad5
font_02_sfnt_off00010164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10164 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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