Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cde77f33dd6daf4…

MALICIOUS

PDF

71.9 KB Created: 2021-03-02 13:47:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 39e51ba5668e19febbbc3f141c8ee23c SHA-1: 6cd5fb34f2c837998ff109a9cba9a2409eaa562d SHA-256: 8cde77f33dd6daf40a1dc0f06fd240d99791a62d03816b3e67b571c5d814ae2b
186 Risk Score

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wix?keyword=minecraft+pocket+edition+0.14.1+apk+download PDF link annotation
    • https://cdn.sqhk.co/fukonovum/kEftXgj/bogeguvabidozenevibu.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/agi2eCv/2095329925.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/ghhjiiu/dbz_battle_of_gods_game.pdfIn PDF document text
    • http://sis-paypal.com/physical_geography_questions_and_answershgjys.pdfIn PDF document text
    • https://zonujonuwug.weebly.com/uploads/1/3/4/3/134309714/doguwix-pigemabemu.pdfIn PDF document text
    • http://triple-doska5.club/the_rise_of_anthropological_theorystyo1.pdfIn PDF document text
    • http://sallely.xyz/jonilariw7vdr.pdfIn PDF document text
    • https://bonesinidojesu.weebly.com/uploads/1/3/4/5/134591006/b77f790.pdfIn PDF document text
    • https://jigugelelatowo.weebly.com/uploads/1/3/1/4/131437208/7753518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448113/normal_5fdc41d57e76e.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/r6hjkLy/jebaxenutigopero.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/jaTycic/classical_piano_music_books_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/jusulikipe/vVovgh2/35189943165.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwewiwudesi/hcraicE/slice_of_heaven_menu_wareham.pdfIn PDF document text
    • https://muxetomanudone.weebly.com/uploads/1/3/1/4/131406273/rojagunifir.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/luborinizu/kuwovusanetidozi.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/91128968256.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/learn_english_grammar_tenses.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/16188600563.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_off0000dd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0C 5444 bytes
SHA-256: 581e732c9465a44b1f09b007f4eb795b35b866ef082727926e3fc2afb3acfdb4
font_01_sfnt_off0000efd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD4 10080 bytes
SHA-256: 434ff81f085322b25613878ab24b694b05ba09d76e8ac294f721d1f5c67ec455

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