Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2ff0c2cbdf7f8a…

MALICIOUS

PDF

81.4 KB Created: 2021-03-27 15:19:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5883adc63dff874885cb85522233266b SHA-1: 596de197907b01ea2b2e84da0274347d11a508d7 SHA-256: 5d2ff0c2cbdf7f8a5b24fd3cbe4d690b5a239722771ab870ca7d0a2a44c64797
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, and one specific URL related to printer maintenance. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests a phishing or advance-fee scam. While no scripts were directly extracted, the PDF structure and the presence of external URIs indicate an attempt to redirect the user to malicious sites. The ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jumiwimov.ru/wb?keyword=how%20to%20reset%20canon%20inkjet%20printer
    • https://gefizubumob.weebly.com/uploads/1/3/4/4/134473977/3888811.pdf
    • http://cozyplacefor.rest/where_most_clastic_sedimentary_rocks_are_formedo47yg.pdf
    • http://hayatevesigar.online/wigidewawobaledmm8w.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • http://trells.space/hello_kitty_cafe_menu_las_vegaso18p0.pdf
    • http://xxlmature.site/how_to_reset_a_jawbone_jamboxly7jb.pdf
    • http://selectgetc.top/luxenanonamojoteb29xw1.pdf
    • http://idealslimitaly.site/berlin_philharmonic_digital_concert_hall_downloadg6lc6.pdf
    • http://worabipupe.mypressonline.com/el_tipo_de_sistema_de_archivos_es_raw_chkdsk_no_esta_disponible_para_unidades_raw.pdf
    • http://xidufefonudug.sportsontheweb.net/wosutugajisajor.pdf
    • http://wordsidepost.top/8411952693094a1z.pdf
    • http://wixujikubipom.mygamesonline.org/fepexurujerufefafegawe.pdf
    • http://gmetry.online/kidde_smoke_detector_without_battery_backupilttq.pdf
    • http://suporefebakibur.mygamesonline.org/adjacent_channel_interference.pdf
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/642e29f4a7.pdf
    • http://tuwukadinem.mygamesonline.org/the_kissing_booth_road_trip_book_ending.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1cb19992-58b9-42b3-b400-e36bf210fbd6/peterobeso.pdf
    • https://uploads.strikinglycdn.com/files/c21990c5-1a14-4272-86ab-95ee476cb2c2/boroxovamedimatid.pdf
    • https://uploads.strikinglycdn.com/files/bca4cad2-8ea8-4692-b77f-c6a04eef6a8b/84050065020.pdf
    • https://uploads.strikinglycdn.com/files/0315dbe3-88f4-4ace-9db7-29d94eaf044e/chamberlain_liftmaster_formula_1_belt.pdf
    • https://uploads.strikinglycdn.com/files/d718d689-2730-42cb-8abf-bcec46129677/40200504325.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102a4.bin
ac9ae4ee86ec557b050e7960cf05dd86d8064cb46c16beaa83a8066a5a34a7e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102A4 5088 bytes
font_01_sfnt_off0001141a.bin
4c97256ee9a769a4fd1ac1d20d8a0e5e8f4d640ff14e2beacae1f9fad3f4757e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1141A 10600 bytes

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