Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed12f0faf5723f66…

MALICIOUS

PDF

74.9 KB Created: 2021-03-22 09:45:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e7316ac01d3b4ca3d317721a7236d9a SHA-1: 57367293cb1e9ff85d48bb638f845d4fafe833f4 SHA-256: ed12f0faf5723f66f40388dc0e092eada8fcacba148db79caa5d5bfc1c3c83bf
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing and scam operations, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the presence of embedded URIs and the overall structure point towards a phishing attack designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/award?keyword=walmart+cashier+application+pdf
    • http://riniwodifole.medianewsonline.com/cuales_signos_se_atraen.pdf
    • http://dimopun.mywebcommunity.org/begiwitebegubixiliredeno.pdf
    • https://cdn.sqhk.co/rubutemoxe/XMKy2jf/mabidafereweki.pdf
    • http://pixell.store/mojufawibalojakijuzozix87iw.pdf
    • https://cdn.sqhk.co/webepinovet/Ej1ieoW/34609654276.pdf
    • https://cdn.sqhk.co/vanewano/ijihv7S/dark_knight_wiki_plot.pdf
    • https://cdn.sqhk.co/parikozug/YUjcgiM/kozaxirar.pdf
    • http://blubadgehelp.net/17216555077fu5om.pdf
    • http://tronreserve.online/ba_pass_full_movie_720piid1r.pdf
    • https://cdn.sqhk.co/dibirolinu/XDejanl/gajev.pdf
    • http://swiss-gear.shop/mitsubishi_mr_slim_service_manuald4dxt.pdf
    • https://cdn.sqhk.co/vuvupewog/1vjgShd/tron_light_cycle_coaster_magic_kingdom.pdf
    • https://cdn.sqhk.co/radofufalam/btZxid0/android_accessibility_suite_apk_adalah.pdf
    • http://xerujupuje.sportsontheweb.net/dikifuso.pdf
    • https://cdn.sqhk.co/lululitoj/hjxjiqs/mtg_tournaments_near_me.pdf
    • https://banodita.weebly.com/uploads/1/3/4/3/134311275/xezomegop.pdf
    • http://lewemegipagolaw.iblogger.org/kusejeni.pdf
    • https://cdn.sqhk.co/fofesali/jdjiifi/adventures_of_aladdin_2019_english_subtitles.pdf
    • https://puponefunojubuf.weebly.com/uploads/1/3/4/6/134670615/68b912e33.pdf
    • https://cdn.sqhk.co/gujuvizaja/mhe5jhe/my_tiny_pet_hack_mod_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://finofinaz.epizy.com/ashoka_video_songs.pdf
    • http://xirozaza.onlinewebshop.net/jamila_aitmatov.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e780.bin
dbf63e7e7b158ff02488de5f62f1f37a6861f0e49bdb0152f8fc7f88359a376a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE780 5408 bytes
font_01_sfnt_off0000f9c3.bin
38f2fb9f50dd319a7537c1c965beceb6a507b0339f3ed411a8f7ded3625e67c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C3 10688 bytes

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