Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22f21926cad0188…

MALICIOUS

PDF

85.4 KB Created: 2021-03-15 00:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9461508d4e1f78e188518daafddb3e27 SHA-1: 21e6d5d3cdad0323dc4e5f17de28cb05f53ad931 SHA-256: b22f21926cad018842a71e23614cc901ae9104bfae6dbdfec2121c81831d505a
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 0.9997

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 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://maypoin.ru/award?keyword=construct+validity+in+assessment+pdf PDF link annotation
    • http://jiwapadenejeza.getenjoyment.net/ruwanizapusojufezijap.pdfIn PDF document text
    • https://cdn.sqhk.co/pododefakes/bgihdjd/best_c64_emulator_for_mac_os.pdfIn PDF document text
    • https://cdn.sqhk.co/nofevemumidu/P2egc8p/57534225001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482188/normal_6028664a0cabb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_6024493e00a61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450638/normal_6016fa1e5c94b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403541/normal_60352c94969a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401703/normal_5ff26bb8be319.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448116/normal_6000dc46df05d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sewujajapivix.onlinewebshop.net/wopolog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab91d6b6-d327-48cb-9721-9fcbac474f49/do_i_need_a_degree_to_be_an_ethical_hacker.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/speedo_size_guide_mens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4227dba-b0de-41d2-aa82-7da5c20ca2cf/lijowuturebaz.pdfIn PDF document text
    • http://widifusi.myartsonline.com/83727854422.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/fibobixupivuxuxizewifefaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/861193cf-e6a5-4b76-b38b-91d87ab5ede8/the_old_man_and_the_sea_questions_and_answers_quizlet.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/apache_tomcat_8_server_for_eclipse.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/escape_room_level_100-_200_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/bullet_bandi_song_free.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/three_skeleton_key_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/900db6d3-f1a2-4bff-93fd-c7f693938e81/boruvenojuraj.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 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001115d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115D 5368 bytes
SHA-256: 6744bc4443aaae5313b7226c831188b40bdf6bf8533ab0a4d902c4e9b32d723d
font_01_sfnt_off00012398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12398 11144 bytes
SHA-256: aef7441c892636d9a4fb6d790e91ebef27d936bd95af4d3c52f3e13879a02d7c

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