Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f9ab1cdb542e25…

MALICIOUS

PDF

81.3 KB Created: 2021-03-18 16:03:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6ffd9023da45a7e12dc9cc83eb92d27f SHA-1: e0a013906ae9dc87bc1756210f895d44ad227a5a SHA-256: 97f9ab1cdb542e25c4ba91d49c761b073cec3fbb82b133bd427da24dd8a2e874
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a mass external PDF link farm, with one prominent URL being https://maypoin.ru/123?utm_term=block+strike+hile+apk+2019. The document body is heavily obfuscated and unreadable, but the presence of numerous external links suggests an attempt to redirect the user to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://maypoin.ru/123?utm_term=block+strike+hile+apk+2019 PDF link annotation
    • https://cdn.sqhk.co/nozedimasav/gg1atfn/mobile_phone_sim_cards_explained.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459166/normal_5ff7944321b1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_6047db99b699f.pdfIn PDF document text
    • https://cdn.sqhk.co/muxaferamet/hgPWVH2/97042084984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409098/normal_600e568e054c2.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/jfifBjh/xbox_one_controller_bluetooth_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/hhNjczL/bevavodipasufawir.pdfIn PDF document text
    • https://cdn.sqhk.co/fufeboxeri/o0ieVjd/66369479585.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/gijbijn/xekuvavulosekemevusepodet.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/ckijHVI/friends_tv_show_wallpapers_desktop.pdfIn PDF document text
    • https://mopebewugo.weebly.com/uploads/1/3/0/7/130776026/gotawuvutuxofari.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/dgcpjgc/shoot_osama_game_online_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/beditakadiga/mFjahhs/lugiruterufu.pdfIn PDF document text
    • https://pagilosotutan.weebly.com/uploads/1/3/0/9/130970008/7695604.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471692/normal_602cd8d476171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_604ab73ed38f0.pdfIn PDF document text
    • https://cdn.sqhk.co/vinikawikuve/TggInmo/cat_warmer_for_outside.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/bpjg0TO/to-_do_list_items_crossword_clue.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/e03e2d58-19a9-42c4-ab08-13aab8239415/2014_lexus_rx_350_hybrid_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1795d1ee-7a58-4a02-9519-497765bfda8e/how_to_prepare_for_hr_admin_assistant_interview.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_off0000f159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF159 2880 bytes
SHA-256: 5f03d2c6bc08d28d18892b3fd5153044a2fff6aad81dd629dfd07635bf6cf50e
font_01_sfnt_off0000fb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB96 5616 bytes
SHA-256: 140bc02706e2e86e6667048c9f490bae2393b1d63b6de342f9581ecf54f76d1e
font_02_sfnt_off00010eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB2 12660 bytes
SHA-256: 01cbded607808088750a2b7702ede1847facfe37e4324ba5f42698fe9620a803

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