Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9616f8067d8f4d…

MALICIOUS

PDF

83.7 KB Created: 2021-06-13 14:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b455c5835e979a61e5a087733e81b674 SHA-1: aa159a468e43a9c262e11fe5a7c5d1e2a5dc2b1d SHA-256: 5d9616f8067d8f4d8f820d6744aa34c2c2fe4ff3017e56e4c7ef06c2c25da3cc
136 Risk Score

Malware Insights

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

The PDF document contains a lure referencing a movie title, "Mandhira punnagai old movie", which redirects to a suspicious URL. This is indicative of a phishing attempt designed to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://irlanc.ru/pbw?utm_term=mandhira+punnagai+old+movie PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387243/normal_5ff9594985f90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_605f70db598a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_60598dc274e84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_60289786b41d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424951/normal_6041458d76d66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_605909955ee3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_602b2d32caabe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390329/normal_5fe3c96485856.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488101/normal_6019d553901f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413121/normal_5ffb22a4e6be5.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/bccb786b-3fc2-4dca-b63f-9b676e410a7a/netgear_plus_switch_gs108e_anleitung.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67246b1b-8c8b-4f12-8ea1-3ff73da78fbf/risabub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e9feeb-51af-4305-81e6-66d21a539749/waduvari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8ea347-61f5-4e9c-9ed7-21f857972419/summer_infant_banister__stair_gate_with_dual_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b0cad7-e238-4978-8296-f6fdbb73be84/animal_farm_chapter_3_summary_shmoop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1cde56-53ca-403c-ab51-0ed637d41c1c/mafopupovuzimebuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eae08c5-6056-4f74-bbed-fb71c2f3b661/80255014124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2023f79a-75bb-4e95-b6a7-c37013a1386d/mary_poppins_book_is_not_its_cover_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5d17ba0-4231-4ec0-b52b-4f54d3469f12/top_notch_fundamentals_workbook_resuelto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851884a8-9544-4fcc-8f2f-33312a356a5f/a_cuanto_equivale_3_4_de_pulgada_en_centimetros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2cf70cd-1119-4312-adc0-90ec648418cc/66688834191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db96e645-d7de-4626-807b-9384e4dd0a9a/jopoverewevenemenote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ce3d10-5cb5-4da8-bc0e-e7e0a9c73dfb/werilujadiratululukabero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22fbda9c-12a6-4044-a4dd-b079b3b3bf9b/inglorious_empire_download.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_off00010b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7A 5260 bytes
SHA-256: cabf3045635f967c09d942830fc34d114146bb546e870c96fd28d18cdad16732
font_01_sfnt_off00011d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D47 10820 bytes
SHA-256: e4413f169c8c2cbd46d16e25dcfd8e3340eb20bc954c97775a33662768a1f49f