Malicious PDF — malware analysis report

Static analysis result for SHA-256 417851f1e7090fba…

MALICIOUS

PDF

67.1 KB Created: 2020-11-17 19:17:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1c80dd8db27ebe127b6a122d173de27f SHA-1: 965494947ad67e642fe5f1d48dc5d8c2c4afd99e SHA-256: 417851f1e7090fbaa3bdc22503b0ae83986ab4eb1a383732dcf2bef6fc72d48c
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://trafficel.ru/123?utm_term=realidades+1+capitulo+4b+answers+page+77 PDF link annotation
    • https://sawalodisixujig.weebly.com/uploads/1/3/4/4/134490012/7927199.pdfIn PDF document text
    • https://tedemikof.weebly.com/uploads/1/3/4/5/134593475/1312585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f8c470e4d4b9.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/vuraradaso/postgresql_command_line_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/ap_election_results_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/313dccd0-8898-4fb0-be61-eea06d409b67/62545692422.pdfIn PDF document text
    • https://s3.amazonaws.com/muguroviv/kuxebak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ecd2642-c9f1-4e6e-a62d-e36c488bb0c7/gujebalujuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce00bf00-e4f9-475f-9e05-28fd8c765753/6921235065.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/wituwekupidusel.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/free_online_baseball_price_guide_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e403a3e3-5643-4326-977b-ec2593d9a314/billy_and_me_davenport_ia.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/84714127949.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB546 5820 bytes
SHA-256: 35790f6de2a6e2d187c0c52363309282b98326d815e3b4aebf040a21aeeecc95
font_01_sfnt_off0000c902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC902 5700 bytes
SHA-256: 88933b01a07a9be68958d77b1400e8dfcedc80038f363eaae884b9d335c89cda
font_02_sfnt_off0000dca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA1 10164 bytes
SHA-256: 2e2f85c1d3341eed7f938ae0615b0f9a70ccc68b296f1a7fdca14299dd3294ca

Open this report in the interactive analyzer, or submit your own file for analysis.