Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0e801efd59cb9e…

MALICIOUS

PDF

82.1 KB Created: 2021-02-14 11:31:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: e22ab21869d7a7e2fee33e5bf3ffe561 SHA-1: 511700d39456d178f9e568e57618f4683189e519 SHA-256: 8f0e801efd59cb9e9e2bfe54c36ab46d464ee040bfb42873f65871611f2c0be6
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain references to game-related terms, suggesting a lure to a malicious site for potential credential harvesting or malware delivery.

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
  • 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/123?utm_term=belladeon+summoners+war In PDF document text
    • https://static.s123-cdn-static.com/uploads/4367281/normal_5fc906af69d0a.pdfIn PDF document text
    • https://pusetuliv.weebly.com/uploads/1/3/1/6/131607438/7667393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468812/normal_601fd1cc2dd0d.pdfIn PDF document text
    • https://ruworelolovifuf.weebly.com/uploads/1/3/4/4/134462917/wixidumoxigi.pdfIn PDF document text
    • https://cdn.sqhk.co/ramazunor/0ngiqgc/diy_dresser_ideas_pinterest.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/SUhbjbG/talking_tom_cat_2_hack_version_download.pdfIn PDF document text
    • http://zdsshop.top/gewexazenipiwes73irm.pdfIn PDF document text
    • http://badgesverified.com/matonipikaxujudotiargc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_6010b635c0395.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484118/normal_60077c2e903d1.pdfIn PDF document text
    • https://sesirolomozanu.weebly.com/uploads/1/3/2/7/132741009/xexuxozetep-rewufefomowu-dowatulu-lukija.pdfIn PDF document text
    • http://believes.space/bubivas5ivw2.pdfIn PDF document text
    • http://datinge.site/hardboiled_eggs_ovenjeiuc.pdfIn PDF document text
    • https://kazenatujexisof.weebly.com/uploads/1/3/1/6/131637291/kodisidegasuza.pdfIn PDF document text
    • http://detonic-italia.website/nudipojamizoxokedoluridaj1ds1a.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirorip/TbvY3Oi/scenario_manager_excel_2010.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/dl1iijQ/4838631162.pdfIn PDF document text
    • https://ralanuda.weebly.com/uploads/1/3/0/7/130775203/44c400b22.pdfIn PDF document text
    • https://xikemusuvef.weebly.com/uploads/1/3/4/3/134322181/wofugu.pdfIn PDF document text
    • http://stonersfranchise.com/79703082397l0x0w.pdfIn PDF document text
    • https://zosomezo.weebly.com/uploads/1/3/0/9/130969149/7625497.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17D 4868 bytes
SHA-256: 5974a28edfec6cf155686d18f288b40e95341e936b9f4a57b1aab97254ce56a6
font_01_sfnt_off0000f1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E8 10860 bytes
SHA-256: ee5c4a32a40a923b99ceb507bc7ea5351c203a3c0b6ea8608003938ba0bb5c12
font_02_sfnt_off00011762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11762 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
font_03_sfnt_off00012c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C29 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378