Malicious PDF — malware analysis report

Static analysis result for SHA-256 153b09ed9c99b8ba…

MALICIOUS

PDF

72.7 KB Created: 2021-02-26 05:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2e24c85c5f9bf1c5438a558599a2bc68 SHA-1: 1b10cf91a72c250b2024b2bd4a260c7d86a212cf SHA-256: 153b09ed9c99b8ba190b5f4fc217f7d87eafa46097514dd52ba915bc98f83310
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://crophysi.ru/award?keyword=is+there+a+5th+hunger+games+book In PDF document text
    • https://cdn.sqhk.co/wugolekufo/hdiemsZ/77590816708.pdfIn PDF document text
    • https://vokubopupabilu.weebly.com/uploads/1/3/4/6/134691430/4f5a73533f817.pdfIn PDF document text
    • https://valutakawewa.weebly.com/uploads/1/3/1/3/131378791/zamel.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/diex1Ns/download_anime_battle_of_the_cosmos_mod.pdfIn PDF document text
    • http://vibusuroku.iblogger.org/exam_ref_70-411_administering_windows_server_2012_r2.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/9645865.pdfIn PDF document text
    • https://cdn.sqhk.co/mewowoji/3Ujjgja/bike_stunt_games_2019.pdfIn PDF document text
    • http://wopazav.22web.org/factory_reset_android_tablet_using_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/mojuzizimu/id8cegf/free_coloring_page_puzzle_piece.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/g4EibWa/crowd_laughing_sound_effect_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/matelasoguje/hjibhi4/the_36_secret_strategies_of_the_martial_arts.pdfIn PDF document text
    • http://ruginegil.22web.org/azhage_azhage_song_wapwon.pdfIn PDF document text
    • https://xirazaju.weebly.com/uploads/1/3/4/8/134859293/dizak-mififujegebon-fajekirimimasa.pdfIn PDF document text
    • https://jidedenevunuva.weebly.com/uploads/1/3/4/4/134498736/zonopurixa_zarobubopipir.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxovunevo/okhcG4f/xizedivo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vigejufad.rf.gd/anno_domini_civ_6.pdfIn PDF document text
    • http://komivarutu.epizy.com/56645233279.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_off0000e059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE059 5332 bytes
SHA-256: fa6003b464a8436c142c06bb07475a939a2cde49c24c349b17f69dd410a8a328
font_01_sfnt_off0000f255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF255 10380 bytes
SHA-256: 1d25f3eef6913797c5122b1c51742864a81b05f43db7b548a680b25260d7da10

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