Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f1be0409103f75…

MALICIOUS

PDF

75.7 KB Created: 2021-03-29 22:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 923ca8139bba5005a27f3b0d88c137b4 SHA-1: c215bda6ad5e5076c88a29299b3d371cb0a61e7d SHA-256: 57f1be0409103f75ef057cdc974f8ec7dbd638d87524a1b4ac965d33315ef9b6
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 0.9996

Heuristics 5

  • 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.
  • 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=what+does+the+magician+card+mean+in+a+tarot+reading PDF link annotation
    • http://wisatemubudu.medianewsonline.com/23136313348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415768/normal_601608b752376.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/canny_edge_detection.pdfIn PDF document text
    • http://gamuxiwami.getenjoyment.net/45406895506.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368501/normal_5fdf9f82dbb82.pdfIn PDF document text
    • http://takipibimaxubov.sportsontheweb.net/ed_sheeran_castle_on_the_hill_acoustic_chords.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456128/normal_60190ba3b01cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469638/normal_604febc43e091.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/34927163720.pdfIn PDF document text
    • http://gusimaziwagax.22web.org/avatar_movie_hd_popcorn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460263/normal_605f450d0c100.pdfIn PDF document text
    • http://wuwudikosegukem.mypressonline.com/business_development_plan.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/isometric_abdominal_exercises.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://weparaxopulo.atwebpages.com/pelemabukuxazu.pdfIn PDF document text
    • http://kalotiwinilobiw.epizy.com/sentencing_guidelines_receiving_stolen_goods.pdfIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/normal_binomial_and_poisson_distribution.pdfIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_8a2336f3cbc44597a6f9297233c734da.pdf?index=trueIn PDF document text
    • http://lokimutopilar.epizy.com/76399912512.pdfIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_d2e4ad3feadf4255b3de30efb88c5e79.pdf?index=trueIn PDF document text
    • https://84d655c4-d84a-4a0c-9c32-0387925bd622.filesusr.com/ugd/6233da_d3b46d91687d4b05a038b525b5983339.pdf?index=trueIn PDF document text
    • http://zorijofoxafa.epizy.com/capitalism_2_pc.pdfIn PDF document text
    • http://visugog.myartsonline.com/78168887426.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3E 5336 bytes
SHA-256: fadd857f0b004c3ea2cf2079fe8302e8e35bbfe04a0c755eacb513012783c1be
font_01_sfnt_off0000fd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD45 10576 bytes
SHA-256: 8f9e63f6285a7095563a6f0ed3c7d0705571dcc03484c57c7e9f555d10b6dd03

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