Malicious PDF — malware analysis report

Static analysis result for SHA-256 3787ada7b079a448…

MALICIOUS

PDF

72.6 KB Created: 2021-03-15 16:02:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b0400180f3e6230253c9058798bab807 SHA-1: 553cfdfe57f987439d6d40c7cf0c69bc919b3c89 SHA-256: 3787ada7b079a448001b141b62f284e917607f08633cc816f0a6cf62b717dcc7
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 0.9995

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://resalured.ru/strik?utm_term=vocabulary+builder+activity+networks+answer+key+early+china PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422631/normal_6039b4df04ebb.pdfIn PDF document text
    • http://xofajenakimexo.iblogger.org/json_simple_tutorial_java.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485589/normal_5ff36126e51c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402262/normal_5fd27bb12e287.pdfIn PDF document text
    • http://vobigabifinu.22web.org/fancy_shoes_the_walters_piano_sheet_music.pdfIn PDF document text
    • http://wiwafapudipib.iblogger.org/bozarekupatajazam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375885/normal_5ffd4cf5d1ec4.pdfIn PDF document text
    • http://rakojegad.22web.org/91968960211.pdfIn PDF document text
    • http://denuziwu.iblogger.org/mathematical_induction_and_binomial_theorem.pdfIn PDF document text
    • http://mukifufiri.iblogger.org/82268343466.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kawugugo.epizy.com/teatv_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17163310-32d9-42a7-81b8-2f8067c9a015/gulixifaduradatepetanuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cc3aae0-cc5a-41b9-8d87-3221ff241dda/jurijovevasakora.pdfIn PDF document text
    • http://fopugaxug.rf.gd/client_invite_letter_template.pdfIn PDF document text
    • http://gamutazuzores.epizy.com/98165674229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c683de6-1024-46a7-b604-5e8cab4831dc/tramontina_pressure_cooker_instructions.pdfIn PDF document text
    • http://lusovipipowa.epizy.com/richard_ayoade_book.pdfIn PDF document text
    • http://dovukixopajiduw.epizy.com/7339327136.pdfIn PDF document text
    • http://kileduf.epizy.com/bulletstorm_game_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/955027dd-a42e-467f-8b54-9ad575c3bfee/bapazedosatizugokadorovo.pdfIn PDF document text
    • http://vifikuvikepavad.rf.gd/pazoriwevobiraxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3915b989-b4e0-443f-bbcb-1b276b45b98d/control_systems_engineer_salary_bhp.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 8

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_off0000dce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE5 5452 bytes
SHA-256: cd0f5e3f7376653958c6482d84b27a547480b80d97ae5d3fc13a42781776919b
font_01_sfnt_off0000ef80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 10104 bytes
SHA-256: b1c55e321ce8a821752d3a8fc0e9dac908ea66356171788e7f7870b5160b0067

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