Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffcf81e2edd11a74…

MALICIOUS

PDF

75.2 KB Created: 2021-03-10 11:03:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a6920790dffb32c612b38ab24f044084 SHA-1: d1b08a6f3033d7c38f9bd05c16c6b0c5a66cf907 SHA-256: ffcf81e2edd11a74ad4b4558d6d8747f0af6845d1967ce53fb5c5aa0a2d64f8d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/aws?utm_term=waterway+sand+filter+drain+cap PDF link annotation
    • https://cdn.sqhk.co/letopoto/QRSXsgf/mmg_precious_metals_prices.pdfIn PDF document text
    • http://sport-stavki.fun/56577517688z0eid.pdfIn PDF document text
    • http://greenbike.shop/xoxopivod32sz.pdfIn PDF document text
    • https://cdn.sqhk.co/gipekoma/Khb9g3r/fugoxir.pdfIn PDF document text
    • http://ek-arenda.ru/how_to_write_a_guided_textual_analysis9xp4g.pdfIn PDF document text
    • http://gagarinski.su/how_to_put_decals_on_a_truckz5tch.pdfIn PDF document text
    • http://copyrightnotices-form.com/dononelukanajigatozafojyol6.pdfIn PDF document text
    • http://steelsho3.club/picsart_photo_studio_apk_cracked3p26s.pdfIn PDF document text
    • http://vizionsmc.net/xirepenuvumoe0fi7.pdfIn PDF document text
    • http://sweetmeet.online/13848646978s3b85.pdfIn PDF document text
    • http://soteguziropuku.22web.org/96102448881.pdfIn PDF document text
    • http://mebelrostov.ru/metformina_850_mg_prezzodwn4o.pdfIn PDF document text
    • https://cdn.sqhk.co/lonuxonemor/jhs98ib/7014617711.pdfIn PDF document text
    • http://8gusevshop.space/how_to_draw_christmas_stuff_step_by_step_easyfp1h8.pdfIn PDF document text
    • http://vuxipoxo.22web.org/96964147603.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buzanokekeb.epizy.com/pimexumerofixosaluxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0a63de4-c847-4745-9a2a-e065c48fde72/27778214499.pdfIn PDF document text
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_b4c93a44f8e4480ab30d17dddf8b98e5.pdf?index=trueIn PDF document text
    • http://ridudexubarite.epizy.com/georgia_learners_permit_laws_practice_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5094a60-9136-4309-8228-73892c580de1/61501520448.pdfIn PDF document text
    • http://vabizofolimise.epizy.com/32333539746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46139ea4-8660-4e8b-8694-3b6d6d670f7e/advanced_oracle_sql_tutorial_with_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3697ee4-b7b4-4c89-a191-1acfe31755f9/96060382395.pdfIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_f2444f5dbc374ac7a50732ebb4dbe6d6.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA31 5356 bytes
SHA-256: 064985c284ed10e11b4fcaf0b8e8787986fc63592f0d6ebb5a2de13ae33da489
font_01_sfnt_off0000fc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC98 10184 bytes
SHA-256: 81cb43a93f2909ae012d1dc88590085a0879ded4a379fe41ccf1c9540ad97f0e

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