Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e7304ee9600e62…

MALICIOUS

PDF

79.5 KB Created: 2021-04-06 04:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3e7844bfe96e6af1254368e9205ec1cc SHA-1: b1a40ba0bea523259767f2c9ff18aba732885eda SHA-256: 95e7304ee9600e6258976112c90440ecc33e3d4b1fe33bd10e63a9e748ba792a
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. 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 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://dafemum.ru/strik?utm_term=how+can+i+learn+matlab+fast PDF link annotation
    • https://cdn.sqhk.co/revikokelobu/hhbfjb9/55432805167.pdfIn PDF document text
    • http://fulokixowo.scienceontheweb.net/1644394476.pdfIn PDF document text
    • https://cdn.sqhk.co/modesarox/ji0ieHj/christmas_tree_coloring_pages_for_toddlers.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/20777081878.pdfIn PDF document text
    • https://cdn.sqhk.co/dizukenepu/jjjjUja/funny_stickers_for_whatsapp_apk_download.pdfIn PDF document text
    • http://choosenews.space/hope_charter_schoolynvny.pdfIn PDF document text
    • http://stassikorskyi.com/vegan_breakfast_ideas_quickahw02.pdfIn PDF document text
    • http://vkrowl.com/sex_starved_marriage_audiobookgjuv9.pdfIn PDF document text
    • https://cdn.sqhk.co/bivosozos/elhbjf8/disney_sorcerer_s_arena_reroll_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/rejelozekazo/aOUjhgK/fageropimatimifo.pdfIn PDF document text
    • http://jakesubinosol.scienceontheweb.net/muxibex.pdfIn PDF document text
    • http://tezijexipilimo.getenjoyment.net/69709253104.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/8264644194.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://milanbeach.fun/jack_lalanne_power_juicer_partss2bbx.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/8db40962-1e46-4e8b-8972-cc82d9340d19/mundo_in_italian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bca074f6-8dc0-4e94-ba44-fcb362f8c804/43272662539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa6d958-957d-4bc9-87ae-b1f6aaa96467/5815014843.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/bushnell_yardage_pro_1000_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5570e3ec-a74d-4e2a-9933-6b6d2bbefcfc/lujikudiwapit.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/29871333211.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/how_to_reset_ipod_nano_4th_generation_to_factory_settings_without_itunes.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/short_stories_in_english_with_moral_and_author_name.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00127b80-2abd-4b2c-9aab-9f7380a19e9c/lazutov.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_off0000f5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AC 5220 bytes
SHA-256: 95e8e39b2620ce3584b7da8e58373a3c6b8ec676c5bb81201bc98412a483a72a
font_01_sfnt_off00010768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10768 11912 bytes
SHA-256: 3ada328dc474d09f6e6d7a56298cf5de74e23b62fb08d91c2f26ba7e6178e37d

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