Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9464ad2147056c5…

MALICIOUS

PDF

74.7 KB Created: 2021-03-27 19:55:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0d1d36127bcab8c0ea75ccd8e3c309aa SHA-1: a47dc9deacb566deb4b209afdef5ae347ef57819 SHA-256: b9464ad2147056c5e206144565ae376f1c07ec79b7c7d2af2b722aa292eb4476
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' containing 30 external links. The primary malicious URL identified is 'https://jumiwimov.ru/award?keyword=cantabile+voice+class+pdf', suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or trojan delivery.

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
  • 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.
  • 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/award?keyword=cantabile+voice+class+pdf PDF link annotation
    • https://kejidelevotina.weebly.com/uploads/1/3/5/3/135326148/tomuduwumo.pdfIn PDF document text
    • https://pufabakorulur.weebly.com/uploads/1/3/4/3/134320636/b68d1d7af85.pdfIn PDF document text
    • https://varijamali.weebly.com/uploads/1/3/1/8/131856150/pulupuzulewi_vivilivomufa.pdfIn PDF document text
    • http://lijovafe.22web.org/char_griller_smoker_side_fire_box.pdfIn PDF document text
    • https://zajavaka.weebly.com/uploads/1/3/5/3/135322154/1860527.pdfIn PDF document text
    • https://renepavavoz.weebly.com/uploads/1/3/4/0/134012855/saparas-rakuxexuzizib-liwewonazejolo.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://uploads.strikinglycdn.com/files/48fd10fb-acde-478d-ab90-1c9d9cf813f7/76804156561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b27ac12e-4586-4b85-83a8-7e3af8587c9d/84440277409.pdfIn PDF document text
    • http://zapurokorilagar.rf.gd/ninifuduxadizaja.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/gotham_black_italic_font_free_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/sony_cd_player_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/tu_bhola_hai_bhandari_dj_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/cambridge_english_advanced_2_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16cf12bb-e54e-4005-b7cd-8296f4e2dc48/kimunigivovuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59637ad0-8c06-4ecb-ad32-a1c65d0318a5/carbs_in_one_taco_bell_taco.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/silopizojeralajumeso.pdfIn PDF document text
    • http://faruvesisok.rf.gd/26356189685.pdfIn PDF document text
    • http://nadetufulibej.rf.gd/61797783833.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/inventory_list_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/english_idioms_with_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/how_do_i_connect_my_sandisk_wireless_flash_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9421e777-9ad5-4994-bbab-e018cddff6b4/40298407991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a2a15a-3401-4dc3-9bf1-9b9c885ca619/widik.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_off0000d7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A9 5064 bytes
SHA-256: cb9b4ee7104187430fccefec529c826abcec82e853af58a5ea880596231ba12c
font_01_sfnt_off0000e8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F5 11288 bytes
SHA-256: 1ea1e45f7973037f87ba776536a59d9f389ddd4be86698a58aac53eb73e93c8e
font_02_sfnt_off00010f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F44 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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