Malicious PDF — malware analysis report

Static analysis result for SHA-256 b632cc21972e8aad…

MALICIOUS

PDF

74.0 KB Created: 2021-03-30 22:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1004d2ac5e34c0912bad5d68669d76e7 SHA-1: 1231e2d87047879711c8fc45b04e34991901712d SHA-256: b632cc21972e8aadb7eeb1d5ae73b503a64c559148daace1c17751eca2a1aef7
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://mezovuduw.ru/123?utm_term=cleo+gold+cheats+gta+san+andreas+apk PDF link annotation
    • http://jakufodunod.getenjoyment.net/athenaion_politeia_senofonte.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/what_is_the_climate_of_the_southeast.pdfIn PDF document text
    • https://bawenijujobafo.weebly.com/uploads/1/3/4/6/134670929/nibovamuvobit_dodida.pdfIn PDF document text
    • http://lotibamuzuti.scienceontheweb.net/letter_of_intent_sample_employment.pdfIn PDF document text
    • http://nitafibejuze.mygamesonline.org/what_color_magic_deck_should_i_make.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/how_to_make_a_boy_fall_for_you_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bivanud/how_to_martial_arts_training_at_home.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/20762379896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6eddfb1-19a5-457f-85f8-0d2af71cba23/how_to_pair_vivofit_2.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/28197177587.pdfIn PDF document text
    • http://xedavabawavela.onlinewebshop.net/java_web_services_tutorial_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/fopaxaxilogelin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b61b44f-3604-4d0d-83c6-36763266dfa0/7675849592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372e3fee-bd2b-4f86-8798-00c6cb6a81c0/best_institute_for_financial_modelling_in_mumbai.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/betting_world_soccer_fixtures.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/analog_clock_live_app.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D0 5304 bytes
SHA-256: 5d5a1bd826196ee491fe70a39f325d0cc8f5b64285325b8b2904085565b4a598
font_01_sfnt_off0000f5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D3 10820 bytes
SHA-256: eba1efda37d9a9a7faf0655e79b898a6c49023ebedf5ec992a96139422eb7f55

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