Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42267c89b791bbb…

MALICIOUS

PDF

80.7 KB Created: 2021-04-25 13:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faefd24c262d73b60be9d8e04fb79bf6 SHA-1: 63be4065611d9f3f155f1fef80ed3f3118c53cdf SHA-256: c42267c89b791bbbb2961f002a020753ea52671aab8b60d8b11c3e14e8bb5193
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs to a suspicious domain, identified by heuristics as an external URI and an embedded URL. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains references to 'Betty Crocker cookbook 1969' and 'wkhtmltopdf', suggesting a lure to disguise the malicious intent of directing users to the identified suspicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=betty+crocker+cookbook+1969
    • http://vipadobotisituz.mygamesonline.org/tofegoxelowim.pdf
    • http://peguxukeziku.sportsontheweb.net/types_of_array_in_php.pdf
    • http://tapidiv.medianewsonline.com/dhl_shipment_waybill_form.pdf
    • http://sesesuruko.mypressonline.com/tubus.pdf
    • http://tofoxewesaxizuz.mywebcommunity.org/89737967176.pdf
    • http://lemafesopeposuz.mywebcommunity.org/how_to_become_a_chick_fil_a_vip_member.pdf
    • http://zememor.sportsontheweb.net/super_contra_7_nes_game_genie_codes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://677e6977-fc43-48b2-ac81-16e478c8573b.filesusr.com/ugd/3750c2_5c667c3058204118aff306f91aa16938.pdf?index=true
    • https://s3.amazonaws.com/dinilederu/hunger_games_mockingjay_part_one_song.pdf
    • https://abee6ad4-cf47-459a-954e-22b9b9bb30ad.filesusr.com/ugd/4bdc6d_041384a97d1842c78178e4210b742f1b.pdf?index=true
    • https://e5baaea7-7007-41de-9367-4ebf3ed55875.filesusr.com/ugd/8e1900_279bd10aedc745dc8b8806ba19306503.pdf?index=true
    • https://s3.amazonaws.com/wupuxus/presto_20_inch_electric_griddle_parts.pdf
    • https://uploads.strikinglycdn.com/files/fa866a4a-9c55-4f24-b9cf-aa6e603fb3d9/use_dlink_2750u_as_repeater.pdf
    • https://s3.amazonaws.com/wujixus/what_is_freedom_for_you_essay.pdf
    • http://fuzolegogi.atwebpages.com/adenoviral_vectors_for_gene_therapy.pdf
    • https://uploads.strikinglycdn.com/files/d4dc22b7-2f3d-4853-a148-ea00a2f5402e/76226471296.pdf
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_c5a7900a23574526becb9f3b461c7fb8.pdf?index=true
    • https://s3.amazonaws.com/xovekolamoxe/hazardous_materials_technicians_typically_perform.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_off0000fc32.bin
1f02d78ff90d142292c0d86dc4f869c5c4cc7870a7d9c86befecad4fa5b64093		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC32 5092 bytes
font_01_sfnt_off00010dac.bin
2cdd8efb3bbd8eac4b81dc454c35bcf7cbae4f2af298ef3687d0812686645fb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAC 11300 bytes

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