Malicious PDF — malware analysis report

Static analysis result for SHA-256 200e3c9cf10daa13…

MALICIOUS

PDF

78.9 KB Created: 2021-03-20 19:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f39c4feed76715cfdb6e7f136811b5b5 SHA-1: 3014555e33ce440f0218f9c44ea9af182c85af2d SHA-256: 200e3c9cf10daa13e291bd2a7292cdac5029d9b67978060d6a15f1b9a94aada5
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed for SEO manipulation. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one URL redirects to known malicious infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to phish or deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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 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.
  • 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://yafferge.ru/strik?utm_term=java+tutorial+for+beginners+pdf+free+download In PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/A2KHAgi/testing_electronic_components_free_download.pdfIn PDF document text
    • http://useraisins.pro/free_yard_lighthouse_plansyliii.pdfIn PDF document text
    • http://xagevogewa.medianewsonline.com/ancient_history_notes_for_ssc_cgl.pdfIn PDF document text
    • http://hookup153.space/10th_class_math_notes_free_download6xj4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488323/normal_5fe56272070bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444357/normal_6027aab6c62c6.pdfIn PDF document text
    • http://nukels.xyz/what_is_the_difference_between_master_quest_and_ocarina_of_timegdw9r.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/ThiANgC/medawox.pdfIn PDF document text
    • https://cdn.sqhk.co/difanemifal/Jrgclgj/two_dots_travelers_trail_remix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388174/normal_5ff854374a813.pdfIn PDF document text
    • http://puzexijabin.mypressonline.com/access_point_configuration.pdfIn PDF document text
    • https://cdn.sqhk.co/penazavoxu/OSOih6r/sokexanuvedasixefexevi.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/gDXCkjg/46296229905.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419654/normal_5fcb387856e22.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/njdot_pay_item_catalog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409421/normal_5ff711c72eae6.pdfIn PDF document text
    • http://tanolugulutewu.medianewsonline.com/biology_practical_book_class_12_gseb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e806861-b4f8-461a-880d-1793f48f7726/que_es_distribucion_normal_en_estadistica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ee3875-a5ff-4a41-b254-4b90e94ada8f/76430482755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fb0cba5-2802-43b8-9f05-b617ba5ff09b/harry_potter_audio_books_free_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10303ca1-0056-483c-903c-fccd7aa721b6/who_killed_hae_min_lee_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e728f201-d36d-4672-90d1-67d2a8e3ac7d/how_to_install_minn_kota_talon.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/xifopuzovolegogekakeniza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdbb7bed-7e9a-4413-8441-c808294abdcd/jatuseb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be57e5a5-0503-4d7d-8f07-a3d4335bf6a2/life_is_a_train_quotes.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_off0000f740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF740 5488 bytes
SHA-256: d0d467f675fcdaef0d81a7aede997849df75012422337c9eb7fc316c59c43140
font_01_sfnt_off00010a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A11 10576 bytes
SHA-256: f9158a250a6ea52ec1a2add76fe1e5569543de46ade4c99956272508b2454f86