Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63b85ea95069b27…

MALICIOUS

PDF

83.1 KB Created: 2021-03-06 22:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0d96744d305997cc30afd89dfe019c32 SHA-1: 705919c41472bd41c29894f5789b280a67378d05 SHA-256: d63b85ea95069b27f61b4505a634c766b93ad94a575ea55480ab79a61f56d3e0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 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://vilenefex.ru/123?utm_term=creative+words+to+describe+the+sunflower PDF link annotation
    • https://cdn.sqhk.co/pasededi/9hihiet/tijefitezigevutosanitus.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/sjciiSm/easy_strawberry_shortcake_angel_food_cake_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/venitalobeni/ghBiaje/28818610324.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/ageRnhf/to_the_moon_lyrics_kyle.pdfIn PDF document text
    • https://cdn.sqhk.co/nivatasob/ijegf3o/wsf_ferry_schedule_bainbridge.pdfIn PDF document text
    • https://cdn.sqhk.co/mokevesin/jaO5ich/gusazigivozaz.pdfIn PDF document text
    • https://cdn.sqhk.co/jaruxabal/evjhiiR/download_sakura_school_simulator_terbaru_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/lma5jhi/fruit_slicing_game_ipad.pdfIn PDF document text
    • http://tiktoktop.design/the_axe_of_sunderingpen2v.pdfIn PDF document text
    • https://cdn.sqhk.co/sifilefu/Thi0hiP/gijarugefe.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/best_location_for_antenna_amplifier.pdfIn PDF document text
    • http://begdas.space/24662337399cltzp.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/I24HhdL/sky_force_reloaded_card_hunting.pdfIn PDF document text
    • https://cdn.sqhk.co/wugoxoxowex/hdieuxN/wizz_airlines_investor_relations.pdfIn PDF document text
    • http://itdiscount.info/fegibexivazof4rbb.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/xjd9aIp/rosajemoborunij.pdfIn PDF document text
    • http://fejavodexata.getenjoyment.net/wavozozisipiloxe.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/9gdgcvu/21127958605.pdfIn PDF document text
    • http://copyrightsupporteds.com/rixibezafdp7he.pdfIn PDF document text
    • http://appeal-ig.com/4292005103q92up.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://uploads.strikinglycdn.com/files/44e62838-3973-4933-9ad6-93f56696f15a/faxesejelukonomelugawes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c64464-c748-403c-a56a-79b8f5d75953/bunn_axiom_dv-3_parts.pdfIn PDF document text
    • http://gajopule.myartsonline.com/mary_poppins_returns_cast_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a05158-1f5a-49ac-9604-a6d6f73bc0b1/are_apple_books_drm_free.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/zosiwonovev.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/86403386298.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_off0000f9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 5308 bytes
SHA-256: 58e6f4bba2512f46d79b4b87ebe30ebeb2e724e8a4fc07b11b7abb4b208e7e71
font_01_sfnt_off00010bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC5 10760 bytes
SHA-256: 7cd3ac32c5cf5cb425473a4d5b38ade84e806f80744fe6472fb1dbc1683787ea
font_02_sfnt_off0001303e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333