Malicious PDF — malware analysis report

Static analysis result for SHA-256 a23809882a1fb4cd…

MALICIOUS

PDF

82.9 KB Created: 2021-03-10 20:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e3471b9db40eabf64f804875c81fce95 SHA-1: 9c396826dc8ad3211c1a6dfe66e83e32846912cf SHA-256: a23809882a1fb4cd57553502605555a883805b4d4dae940d51427262db55e105
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to disposable hosting domains, suggesting it is part of a phishing or malware distribution campaign. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document is designed to trick users into downloading a password-protected archive, likely containing a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://fokemale.ru/strik?utm_term=primer+curso+de+contabilidad+elias+lara+flores+precio+pdf+descargar+gratis PDF link annotation
    • http://movoxazukum.22web.org/tasks_status_report_template.pdfIn PDF document text
    • https://cdn.sqhk.co/kajemuwasutu/jeBhbuT/ninja_driver_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445881/normal_601da7d59f5f6.pdfIn PDF document text
    • http://nariwunuzaw.scienceontheweb.net/38454052534.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/eUihjbB/pocket_door_sizes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378641/normal_60091661997b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449014/normal_6005625468128.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/best_wilderness_survival_tv_shows.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://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_1ef75279906f43bfa5a3ba29a00f4315.pdf?index=trueIn PDF document text
    • http://vajapojaperusu.myartsonline.com/82266551467.pdfIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_e7b84e24cac54bf8a1bd4a9157833218.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/popupo.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/14824829185.pdfIn PDF document text
    • http://lavodusepigixu.rf.gd/sipepe.pdfIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_375e6cb237de4b07a7abb0fc1a904a56.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/voter_list_rajasthan_2019.pdfIn PDF document text
    • http://bakutogigu.rf.gd/68777386164.pdfIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_8caf5d7cd95e4e65a81448e0c79a7d67.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

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_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 5500 bytes
SHA-256: 813d4c07496bdf2578fd081d9724d972d99464f4498c0c489efa1fb886f26974
font_01_sfnt_off00010568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10568 12524 bytes
SHA-256: ca776ff872243e4d340d1c75af5a1a33fcc8c12fcb2ea8dc08a1d15f96006e2a
font_02_sfnt_off00012d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D63 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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