Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7487afb981e04e…

MALICIOUS

PDF

83.3 KB Created: 2021-04-03 17:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0b3cc32d2a254e5044123005c9b32114 SHA-1: dde188808586dfbdf3af7de39bd72b321e62fa16 SHA-256: 5e7487afb981e04eb6ffa2f37058e91d6393309ac466134295827d6e28197fb4
126 Risk Score

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 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=minecraft+village+guard+mod PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372354/normal_5fc7a181102bd.pdfIn PDF document text
    • http://nitopito.22web.org/33738592449.pdfIn PDF document text
    • https://duvarifa.weebly.com/uploads/1/3/5/3/135347264/907a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_6015890b6f34a.pdfIn PDF document text
    • http://kaxidabifibag.iblogger.org/2567755392.pdfIn PDF document text
    • https://lapedifulijep.weebly.com/uploads/1/3/0/7/130739603/be343fae2b00.pdfIn PDF document text
    • http://bobiruropiles.22web.org/kalinka_sheet_music_brass_band.pdfIn PDF document text
    • https://dudafenerow.weebly.com/uploads/1/3/4/9/134900552/togetiwip-zavube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484995/normal_602a0f5da4fcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491933/normal_601e37df0780d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420604/normal_5fcb971ad999a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426822/normal_5fe2d209ad7f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457332/normal_6003b1cecc856.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bepinodobax.rf.gd/26607761211.pdfIn PDF document text
    • http://gokegufokefewev.rf.gd/2018_toyota_camry_xse_v6_for_sale_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b0f6a1-611b-4a8a-aa31-ff2e407cd3bd/50362571589.pdfIn PDF document text
    • http://tisenunab.rf.gd/amos_tversky_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b89c94a-f6dc-418f-894a-f70b6984b522/14537878967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c266ae55-84b4-464e-ab33-16a4e14f9294/uniden_bc125at_bearcat_handheld_scanner_review.pdfIn PDF document text
    • http://xafapitadejafi.epizy.com/legends_of_tomorrow_episode_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5fa6017-5626-447b-a05c-1dd6b4fc1d83/ap_3d_concentration_ideas.pdfIn PDF document text
    • http://rupegofiminatef.epizy.com/30611915522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a5163e-673c-4de5-b883-baf2552545ed/descriptive_writing_examples_for_kids.pdfIn PDF document text
    • http://vosafaw.rf.gd/rotten_tomatoes_countdown_guides.pdfIn PDF document text
    • http://beralopijabeziz.rf.gd/meratulepifadufina.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE846 5228 bytes
SHA-256: 0d58aa400f27a14d1f512dd2350a7c7778fb3598a9335bb9d65c2c3891c20cff
font_01_sfnt_off0000fa0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0F 19428 bytes
SHA-256: 704f1652db6dfed6b0e4c4e712390810eb7e38b2022d01f26cfec7f5c4c91134
font_02_sfnt_off00012882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12882 16064 bytes
SHA-256: 0143f1303204e677e4f5ca9ddc1e3137fc305ad20a48f3e13082630f190f0e83