Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3e5415c757d616…

MALICIOUS

PDF

77.4 KB Created: 2021-03-31 02:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a62278657e8b7288960425ceeaa69337 SHA-1: 31a859fa71ddd409aae217c046458539eb46da2d SHA-256: 0a3e5415c757d616559ce4b83a8ad76537908effce25963a81f7ab082a8fea1d
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 0.9998

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://resalured.ru/strik?utm_term=discrete+fourier+analysis+matlab PDF link annotation
    • http://all-gopro.com/figurative_language_definition_and_exampleskngin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_6023fd8e106c0.pdfIn PDF document text
    • http://kasiwewevono.iblogger.org/ca_dmv_commercial_handbook.pdfIn PDF document text
    • http://mbfsopg.com/neil_degrasse_tyson_astrophysics_in_a_hurry_downloadluw0m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376870/normal_5fff2459da4f7.pdfIn PDF document text
    • http://jufobimagif.iblogger.org/suwafoxarukoxag.pdfIn PDF document text
    • http://pakefuvinaput.22web.org/ramunabuvebudupudov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488804/normal_60504a4eca708.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/2ac733ad-973b-4ff3-9b58-6edbb61810bc/92280520444.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/airtel_postpaid_bill_payment_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff07514a-1154-4a98-8cce-a7145ee84432/peterbilt_359_service_truck_for_sale.pdfIn PDF document text
    • http://bukezodebas.onlinewebshop.net/acrobat_pro_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/912fa5a8-f1bb-4140-b1db-93bde9f9ceb7/how_old_is_paige_spiranac.pdfIn PDF document text
    • http://tiwadelir.rf.gd/gst_annual_return_form_9a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c276bcb4-8731-4cdb-98c1-863218f184fa/kukurirumurir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216992be-4553-4a97-9a29-657bb9bfcfa7/rotakivuzasitibozedarofus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34554fbf-550e-4119-9b3e-a0a66d4e84ad/cooking_merit_badge_book_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f623c7cb-2683-4c6f-a270-cbaab720110f/fisher-price_roarin_rainforest_jumperoo_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24953403-e6f7-461d-9146-a05747434f34/what_is_rawls_social_justice_theory.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_off0000ed7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7A 5268 bytes
SHA-256: a109f4bb066242464a330d1413266e563d0e9f809a87ddd74c50718db51c1f2c
font_01_sfnt_off0000ff62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF62 12032 bytes
SHA-256: bb496515a40873b2fbccc718031b1f3ef2c0f5a8a6d8f14fe36442e871629ac6

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