Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a1f1736ef1cbfd…

MALICIOUS

PDF

85.8 KB Created: 2021-04-02 00:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 02dc7a1ab9ee348daad0d9a6d70c8227 SHA-1: e6ac599236d6d1f4b0ddc3f2d8c8a60a30b3ef31 SHA-256: d7a1f1736ef1cbfda37601179d8035690e3c633d5a175b1f28a8cb11118bb7c1
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://resalured.ru/123?utm_term=coming+soon+html+template+with+timer PDF link annotation
    • https://cdn.sqhk.co/sileluzorupo/ajbehgh/34110366937.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/aAjfhgp/belidabawovigo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386848/normal_6007daa807ad8.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/ejihjhb/princess_cruise_ships_sailing_now.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378175/normal_5fccfef4871e3.pdfIn PDF document text
    • https://cdn.sqhk.co/kimamena/dhbphdD/89911394908.pdfIn PDF document text
    • https://cdn.sqhk.co/mapigusene/ggKicTB/85164004010.pdfIn PDF document text
    • https://cdn.sqhk.co/geruxibab/hightjf/facebook_app_dark_mode_ios_14.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/2920a822-f8e4-4aa9-bff4-46606ded0c43/mewonibusidobitudafezaka.pdfIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_bf05d82a5a80444c9b182550e52e44d9.pdf?index=trueIn PDF document text
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_8bbadeb0476b45f1aaf528491587eebe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5964b3a-4563-42de-b0c3-13d2da2569f3/the_blood_of_olympus_chapter_1_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2706ff5e-aa04-4e47-a083-e3567077061e/vexujigifofudanal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82074cac-a532-4b44-9866-8b0f1e105a6b/the_soul_of_money_barnes_and_noble.pdfIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_a9c99623451a4c8b99b7f916afb273c0.pdf?index=trueIn PDF document text
    • https://6ce95562-7558-49ee-a7b0-b3003db3b0e9.filesusr.com/ugd/d13e1f_9810ffb9a6b743a09e450aafb9b146a4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0558ad2b-783f-4dfd-8405-5893bd4c4d99/what_does_parcel_collected_from_sender_mean_dpd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac55eb1-d20e-49c3-9f60-17d45533c187/sewateg.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 5

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_off000103f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F0 5136 bytes
SHA-256: e67da98b52881f0236a2ba1ff3e6cc0198502d43816d23b2c50fd4d6e2d7d036
font_01_sfnt_off00011544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11544 10892 bytes
SHA-256: f77db1cf7b386ff6090fdf4ee44a0d4f3e1e97f580961514b832120101418c79
font_02_sfnt_off00013a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A16 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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