Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c8233e66a839e6f…

MALICIOUS

PDF

73.1 KB Created: 2021-03-25 05:22:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 55b5bfa7f82c8a1f9cbbe05c75b86b50 SHA-1: 94f598a22b03bf75b72eb39ba891c5ecebc77592 SHA-256: 8c8233e66a839e6fb53f73c2280b7671dfa6e2465c3a9880ec9e5ef2ef587e5f
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://bologen.ru/strik?utm_term=how+do+you+read+a+ruler+measurement PDF link annotation
    • http://foxilajat.sportsontheweb.net/presonus_firepod_interface.pdfIn PDF document text
    • http://italylife.pro/rukitaxidoxo9he3m.pdfIn PDF document text
    • https://cdn.sqhk.co/zumumolebajo/NiaHJhb/flight_tracker_delta_1289.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/Whuqhef/fun_race_car_games_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/jxjidG7/wifi_driver_for_windows_10_free_download_hp.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/meteorology_today_ahrens.pdfIn PDF document text
    • https://cdn.sqhk.co/rivinodati/icaghh8/b._y._o._t._bryan_tx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392463/normal_5fdd1c78c7c15.pdfIn PDF document text
    • https://cdn.sqhk.co/forinabam/gU7stp5/gamave.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/heghEZb/55947798184.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/fjxidic/26166114708.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/f3hawJP/fujexexapekekakozekuvogof.pdfIn PDF document text
    • https://cdn.sqhk.co/kupovite/fSljhhc/flat_pack_kitchen_cabinets_perth.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/gibkTWB/vibaxixipogezuvipe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372105/normal_5fdf81732d6c1.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/qNidBid/yellowstone_season_4_finale_spoilers.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/epJVjiK/funny_king_tower_clash_royale.pdfIn PDF document text
    • http://nofubajabuv.medianewsonline.com/article_writing_for_class_11.pdfIn PDF document text
    • http://savadaqwe.space/how_long_to_dehydrate_ground_deer_jerky_in_dehydrator64q6a.pdfIn PDF document text
    • https://cdn.sqhk.co/pukikojat/cijngdN/50512243720.pdfIn PDF document text
    • https://cdn.sqhk.co/wanifeloxege/hbbhkie/6th_grade_worksheets_free.pdfIn PDF document text
    • https://cdn.sqhk.co/livisade/Kbjcogo/prince_of_persia_escape_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wotidupodugi.myartsonline.com/60343243492.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_off0000e090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE090 5128 bytes
SHA-256: 173ab317716b6a9d0008d5552dbc27c24fd141d32ff49e9bff6d01769a0ee979
font_01_sfnt_off0000f1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F9 10460 bytes
SHA-256: 7279dab315d41acff903f84188a2d3916626004f99eeaa68e89128638ad3c3f7

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