Malicious PDF — malware analysis report

Static analysis result for SHA-256 604c5e3247463d37…

MALICIOUS

PDF

81.6 KB Created: 2021-03-08 18:20:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2822fc033a735b1b8b765208a51b1822 SHA-1: 295f6dcedcf6b6aa4df4e955e187f70036026c2a SHA-256: 604c5e3247463d37cc8519b49ab7d8bc2746babbb69c81315d40919e1a879220
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/strik?utm_term=lux+tx500uc+manual PDF link annotation
    • http://wosozage.mypressonline.com/83202142469.pdfIn PDF document text
    • http://omynutural.space/vavuvuzugomawunywpj.pdfIn PDF document text
    • http://bilabugova.iblogger.org/ap_grama_sachivalayam_official_notification_2019.pdfIn PDF document text
    • http://mabojexovepa.22web.org/wunokuzorudizugu.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/le_corbusier_five_points_of_architecture.pdfIn PDF document text
    • http://pigovaze.iblogger.org/eq_enchanter_spell_guide.pdfIn PDF document text
    • http://punejew.mygamesonline.org/crochet_patterns_for_hats_free.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/jefidoduzujiro.pdfIn PDF document text
    • http://cetop.xyz/betrayal_at_house_on_the_hill_legacy_spoilerszf78q.pdfIn PDF document text
    • http://mailedflkf.site/553602849606nkxs.pdfIn PDF document text
    • http://nilokobavetefe.22web.org/casio_protrek_pathfinder_pag240.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://14319df0-7947-4f0d-bbb3-eaa17d5eb23e.filesusr.com/ugd/c45f38_bf5010754d0a404aa1010bb3a9d0f08e.pdf?index=trueIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_e373a158ab1242e190dfbb7bb4d194ad.pdf?index=trueIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_99f098c12b954684b938c3c4d97628b4.pdf?index=trueIn PDF document text
    • http://porujikegen.epizy.com/ielts_listening_8_test_3_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2409c8a3-b565-43e3-b0d5-d7f300195df5/hp_laserjet_3055_scanner_driver_for_windows_10_32_bit.pdfIn PDF document text
    • https://6184de0c-c318-42a7-882e-c5ddc63b817d.filesusr.com/ugd/1c8c1e_1ba36e436a04414fa5a61316362a189a.pdf?index=trueIn PDF document text
    • https://ce3a146a-d504-4efb-981c-4593fb85d965.filesusr.com/ugd/5b5da7_9c78a9efe7054dfb835b72a923de2dbd.pdf?index=trueIn PDF document text
    • http://vaxomuterok.epizy.com/bhojpuri_video_movie_song.pdfIn PDF document text
    • http://todonoto.epizy.com/pdf_book_reader_app_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/643f2abf-3536-4ad2-b640-9c212c8a5e5e/how_did_the_map_of_europe_change_after_wwii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46964f01-9bc3-4de8-afe5-ea89ed3cd329/73450192913.pdfIn PDF document text
    • http://zimemotom.rf.gd/zapudinezabuzavapef.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57A 4552 bytes
SHA-256: 06c5ca1b7ccd64b99150fcc8e2d519a5b5ecf9587ffcdfb2ac40c2318b9cb53d
font_01_sfnt_off000104dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DC 11228 bytes
SHA-256: b49916ee440b43e89ff3a6bb33f64272dcff1fbcb151022a2bb08f1056528c17
font_02_sfnt_off00012acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3