Malicious PDF — malware analysis report

Static analysis result for SHA-256 411a604eb64654eb…

MALICIOUS

PDF

76.9 KB Created: 2021-03-24 15:14:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b8dc811f2d6b67a29299593dbc0dcab0 SHA-1: 1258930894bc11fc7892efa61083854e7d690f09 SHA-256: 411a604eb64654eb6d9210389541572238622341956ec53276d9b318deed5c5c
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/123?utm_term=beach+buggy+racing+2+pc+game PDF link annotation
    • https://surugodinatuv.weebly.com/uploads/1/3/4/8/134861851/takune.pdfIn PDF document text
    • http://smartcoin.design/companies_that_closed_due_to_covid_philippinescxg4t.pdfIn PDF document text
    • http://usene.xyz/2013_taotao_50cc_scooter_parts24ciq.pdfIn PDF document text
    • http://porn77.design/vogupiwajafuvewof5oikk.pdfIn PDF document text
    • http://1ux.site/how_to_use_stiebel_eltron_heater1anm9.pdfIn PDF document text
    • http://reweder.site/planet_fitness_plattekloof_contact_number1pjrk.pdfIn PDF document text
    • http://workmonster.net/who_was_the_first_european_power_to_gain_a_foothold_in_asia_was_calledgli32.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/mofidiferajamuvife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a62dcd6f-06dd-409b-9ab6-7b67514347c6/1284804161.pdfIn PDF document text
    • https://b27aca93-056c-4dd2-83a6-fd909c9f709d.filesusr.com/ugd/2ba3ac_fe46453db5b748bcb5dd1a0a686a8165.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a19279-ee96-466e-a600-325894bea289/13949851975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95d64b4e-4b78-4524-8977-128af982c1ac/nelson_handwriting_worksheets_free_download.pdfIn PDF document text
    • https://827a6da4-a69c-4806-aaaa-db522494bc4d.filesusr.com/ugd/cb5916_11748156e7e54c82b2ce8aa717e688c8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae4f2be9-baa3-448e-be1d-bf83cd5a6d06/xuraxix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dfe9dac-56b2-4ab7-88c1-1da8e73d8d8a/fifuwuzusiguzidelavobomo.pdfIn PDF document text
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_cf74583964124f748eed9b5e4a5f6c9f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/02438776-ee1f-4bbb-afee-dd9373ff1fda/does_kindle_have_harry_potter_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f39ff78-a4c6-4dec-842e-a8b51457c258/94121826432.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_off0000eba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA9 5560 bytes
SHA-256: 23cf22f1da8ebeef8ed8378fe54685102009332b03c9dcc8cf06855cca479735
font_01_sfnt_off0000fe76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE76 11816 bytes
SHA-256: 8513be63b25b74a223a569cb151eecb1324ef786cad0bc8b7d854d5ab480dc06

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