Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d0be8ebcd6a8f5…

MALICIOUS

PDF

187.8 KB Created: 2021-03-30 17:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f72443bbaf3b43e0271868dbc9b149b7 SHA-1: 50b66af263655ce8e7924ac88c98e38030d09311 SHA-256: d6d0be8ebcd6a8f59ff3369dd13ae8adaa34d9f5ece13faa75676c9ffae8d4ce
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://crophysi.ru/wix?keyword=age+of+imperialism+in+africa PDF link annotation
    • http://nojagemegoxeda.22web.org/take_screenshot_mobile_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369146/normal_600654565d1e7.pdfIn PDF document text
    • https://cdn.sqhk.co/ramidazumiko/GiaidDm/movie_scenes_without_dialogue.pdfIn PDF document text
    • http://lomigizukifomor.22web.org/xiaomi_mi_a1_android_10_alacak_m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420230/normal_605d86a67aef6.pdfIn PDF document text
    • https://cdn.sqhk.co/latosagax/iibLCss/zombie_catchers_2_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404727/normal_605c9af85a430.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466666/normal_5fe13564adb00.pdfIn PDF document text
    • https://cdn.sqhk.co/retakabif/1idRw4V/love_story_books_to_read_online_in_marathi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494893/normal_601f64f0e69f8.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/jghRuiz/here_i_go_again_chords_ukulele.pdfIn PDF document text
    • http://mofemaruwek.sportsontheweb.net/dictionary_of_the_old_testament_historical_books.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pefimubis.myartsonline.com/hitchhikers_guide_to_the_galaxy_movie_watch_online_free.pdfIn PDF document text
    • http://tudurafobazax.epizy.com/l_t_annual_report_2014-_15.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb00d36-928a-44fa-ac91-85f71dce3229/how_to_use_multiple_excel_functions.pdfIn PDF document text
    • http://gurapaf.epizy.com/42983445825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47d2a40-58ef-4a40-a88e-66c95ba943ee/93007816068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7266799-9031-43e5-bb60-a00a63fb5f9b/oracle_application_tutorial_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16eec92-5017-48fb-b0fb-2e6ca469ad70/zesaz.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/walking_dead_graphic_novel_193.pdfIn PDF document text
    • http://lusajafimaneru.myartsonline.com/xidibojisikuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd28ffca-4bce-41f7-8180-b206dcff04ff/97424046894.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_off00028e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28E4A 3772 bytes
SHA-256: 6fdcb867820ccdf75a99249468ae0f69a485d9ec2ae9289342da26c3870e9452
font_01_sfnt_off00029ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29BA4 5324 bytes
SHA-256: 8b49585abb2f518736ec6ac88c98460f387fa259aed88f7a9852f16b0bb1dede
font_02_sfnt_off0002adb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ADB2 17104 bytes
SHA-256: ad45c44636b2faa6448c7e2369e7b616d26dd136d302ab27945e2cddd28c7df6

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