Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6d3d71f86012e3…

MALICIOUS

PDF

72.9 KB Created: 2020-10-25 11:26:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: aa116945078e00805d73fb5181890927 SHA-1: 7cbcd9d1294cd467447f190a5f0cfdcbdc5755da SHA-256: cd6d3d71f86012e37de45d16dbcd41d9d8ea47d32d3624c6bb817f9e9d9ddd01
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/aws?keyword=arjuna+classes+book+pdf In PDF document text
    • https://fijuwokokaku.weebly.com/uploads/1/3/4/3/134382009/xiguwomejolipow_vofir_jajilemopuxi_sukuzatow.pdfIn PDF document text
    • https://butebipibib.weebly.com/uploads/1/3/4/2/134265815/famewit_wokas_nubanir_nitupowogumum.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zidebesirolabavo.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/kopiwu_gotatumeturi_bovejixegas_vivikow.pdfIn PDF document text
    • https://gujodoludota.weebly.com/uploads/1/3/2/6/132681740/tepokesadaliworili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378606/normal_5f94b70e97af5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374373/normal_5f8b321ef3552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f8ec1cfc1c8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f8e16afa4a30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f8a7f848929c.pdfIn PDF document text
    • http://arjunaclassesbsp.com/AlleIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f7fb5db-b980-4e54-b6a7-61003c8232e8/la_quinta_new_orleans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17ac20c6-827d-4355-856b-8cdc3ab37b9e/64603982484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e2030de-35b7-4913-82fb-96c4565e2930/nanulafutus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1185/0407/files/modern_marvels_cheese_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8067/8557/files/best_stealth_games_for_android_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/5129/4376/files/harry_potter_and_the_sorcerers_stone_full_movie_online_free_dailymotion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0783/0948/files/drift_hunters_unblocked_top_speed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6980/6494/files/guxalenepevagesapiboras.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/vikukebaxesorasi.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/58443126945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59ae0c9c-31ed-4473-90dd-c241c7da57b1/nilajuvaroratibapari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a55328e-b2a1-4cfd-bf8e-c3359d01ed1d/mugewizapigomenedopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0d49d81-b374-4730-ada3-adafc0f51391/57809496445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce05775-14ac-4e12-b1d9-e6374feadf09/kidivu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000c5f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC5F9 26764 bytes
SHA-256: ca4f9f2ca61a0a6f1d2f51b3adb6a4d3e3c6ae77aaef3d7fb96fb6437efdc973
font_00_sfnt_off000083c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C9 5416 bytes
SHA-256: bd008ac0c7e68c37ea1a32fb5728f189f8862eb7e9908afad859256a7a9e8bbb
font_01_sfnt_off00009634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9634 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0000a197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA197 10740 bytes
SHA-256: eed683cdc431e2c87af9b0050c28f7bc3a1ae6400be059f93c8af083a306bfa1
font_04_sfnt_off0000f62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62A 9080 bytes
SHA-256: 0fd9eddd7b59f08e59d76484bf3f04619bf10b0d293b800a247e1b1b5ae66cf7