Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda7c3af5ff0c432…

MALICIOUS

PDF

81.7 KB Created: 2021-03-12 15:58:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a34727b4f654ce1d72bf345f03830aef SHA-1: f1941c8f0fb203d977701f8c2ddd59b77b5b2f13 SHA-256: eda7c3af5ff0c432feeeb3edf7dcffee245c902f3f9f374d50e7e23ddaa97693
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI. The embedded URL, 'https://pelibifir.ru/award?keyword=class+12+chemistry+haloalkanes+and+haloarenes+ncert+pdf', suggests a phishing or malicious redirection attempt disguised as educational content. No scripts were extracted, but the PDF structure and external URI are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/award?keyword=class+12+chemistry+haloalkanes+and+haloarenes+ncert+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4391331/normal_5fcd841e6df37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495392/normal_5ff78bfc2c651.pdfIn PDF document text
    • http://bavewemelemare.iblogger.org/photography_website_templates_w3layouts.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/ii8ZieP/fleet_combat_2_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/ijkKgdT/wisijugamawe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412758/normal_5ff40f58cb862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_5fd841a49be27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465269/normal_5fccb4ef47dc8.pdfIn PDF document text
    • http://zujavok.22web.org/neteller_android_app_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lafebevu.rf.gd/gumej.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/51359565911.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/68483769149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/187e7c90-dae6-4804-b34a-609e45f093b3/black_and_decker_20v_circular_saw_blade.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/tft_league_item_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/adobe_printer_spooling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98eb267-1bbc-46d0-b8bf-bc7c03d7ac6e/31933262274.pdfIn PDF document text
    • http://zotinulimoruv.rf.gd/70059264803.pdfIn PDF document text
    • http://zosonigileg.rf.gd/sony_tv_aahat_serial.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/dinosaur_head_cake_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/what_is_a_loop_in_programming_language.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_off00010228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10228 5648 bytes
SHA-256: 289a2a7d2c1d7c79c9098510b9135bf2da5b0c5ed4a05dd30a37de9bce1a7089
font_01_sfnt_off0001153f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153F 10524 bytes
SHA-256: 5e8301e6d6fee9cbfda1c2fd0f06fe4ff4cbda8a1e0dc7bdbe0b00d17350a9e8

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