Malicious PDF — malware analysis report

Static analysis result for SHA-256 334747bee295e7df…

MALICIOUS

PDF

79.1 KB Created: 2021-03-01 01:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4ff001fc9d765e4cdad491e529a8d320 SHA-1: 79b545e1f68fd7d6768050336b2e1b86bd3944f7 SHA-256: 334747bee295e7df80dd8805b3b030d6f14a3cb032071b4f597ab68e40bb3459
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs are likely used to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/wix?keyword=umbrella+academy+pdf+portugues PDF link annotation
    • https://suzeziji.weebly.com/uploads/1/3/0/7/130739492/volekurefi_gevugipap.pdfIn PDF document text
    • http://scrlt.xyz/52443784440hy00r.pdfIn PDF document text
    • http://on-arenas.com/kung_fury_movie_castmcrpe.pdfIn PDF document text
    • https://duwifugikez.weebly.com/uploads/1/3/5/3/135351140/fazukuke.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/16463480052.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413226/normal_5ff27d44523fd.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/9549689.pdfIn PDF document text
    • http://rubyshup.space/how_do_i_turn_off_game_mode_on_my_keyboard70j12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488133/normal_60375191bf628.pdfIn PDF document text
    • http://webcam-model.online/26199129627br336.pdfIn PDF document text
    • https://xapefawisago.weebly.com/uploads/1/3/4/7/134771693/jarivisevil-milika-lezobuxosumisu-wekuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481154/normal_600b75e928efd.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://s3.amazonaws.com/suxiweke/20282270524.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/amalapuram_bulloda_telugu_song.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/mibaw.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/how_many_cards_start_munchkin.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/61445917259.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/70494260993.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/espejos_eduardo_galeano_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/beginners_guide_to_game_design.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_off0000eaa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA2 5436 bytes
SHA-256: 0c5b46fc2dc8b864b9dbd4853a55c2334f45c65a0ad07b95405e2afdd3377757
font_01_sfnt_off0000fd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD25 10608 bytes
SHA-256: 6e830dd559b8289f1188bf2e193cc572dc70154668e4c1b246d18139cfb420b0
font_02_sfnt_off0001212b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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