Malicious PDF — malware analysis report

Static analysis result for SHA-256 73b2024672d22857…

MALICIOUS

PDF

64.2 KB Created: 2021-02-20 03:38:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2a047ce1aec952e47c4147e00b8be827 SHA-1: 487b267be8d3998ec492daafab2009e33e502242 SHA-256: 73b2024672d228575ae86f7984abbbdb101a7a7d9fca5f94934f09a61d319a0e
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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/wix?keyword=physical+science+assessment+probes+solids+and+holes+answers In PDF document text
    • https://cdn.sqhk.co/kugoxepif/jcjUgdq/bottle_jump_3d_uptodown.pdfIn PDF document text
    • http://dewemopiwofim.22web.org/upper_extremity_arterial_doppler_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/Ethjxjc/tangled_season_2_trailer.pdfIn PDF document text
    • http://krym.today/fuxetedabobizvwqn.pdfIn PDF document text
    • http://santecmb-sarl.com/resident_evil_revelations_cheat_engine1wxpp.pdfIn PDF document text
    • https://sepolekabu.weebly.com/uploads/1/3/1/6/131606201/2633496.pdfIn PDF document text
    • https://poxosuliw.weebly.com/uploads/1/3/1/3/131383655/vetabufukadol.pdfIn PDF document text
    • http://gobotujadix.22web.org/29480710772.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/tEjizfK/learn_html_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sixojifez/hjZEhd5/photo_transfer_app_bitwise.pdfIn PDF document text
    • https://xugubevowasisof.weebly.com/uploads/1/3/4/8/134885616/xemimot.pdfIn PDF document text
    • http://dihtyar.online/370996507648trct.pdfIn PDF document text
    • http://denizan.com/84110128312atzkd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391623/normal_600cc0c74f3f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/takurugilij/adhd_symptoms_checklist.pdfIn PDF document text
    • http://napubuxuwel.epizy.com/changeling_5e_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/69962281108.pdfIn PDF document text
    • http://vuzejonesiji.epizy.com/38403572388.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/safety_data_sheet_for_bar_keepers_friend.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/64417475398.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_off0000be47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE47 5648 bytes
SHA-256: a91207bd4f406c94b902485b30f71d3344c611bde1c494277d99ab6c090b44d4
font_01_sfnt_off0000d15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15B 9376 bytes
SHA-256: 712f8d54def0c953cc41859c5e1454358e20bde746e12a9f7c966ea19075424b

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