Malicious PDF — malware analysis report

Static analysis result for SHA-256 895288905fcc1445…

MALICIOUS

PDF

229.6 KB Created: 2021-03-31 11:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a08098f200cfc61aafc413090f319141 SHA-1: 8868887872bea096678169b0f8ae4176ce16d1ec SHA-256: 895288905fcc14454b07d8bf285fbb1b2ab925ef92b646276d8bc0bb1774e24b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=little+lux+one+direction'. This indicates the document's primary purpose is to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious URLs and the redirector heuristic strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • 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.
  • 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://yafferge.ru/wix?keyword=little+lux+one+direction In PDF document text
    • http://kneeksi.ru/how_to_hypnotize_someonehgpff.pdfIn PDF document text
    • http://lotsmen.com/90809555849kak00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443810/normal_5fd3b73512d6c.pdfIn PDF document text
    • http://avto-trokot.xyz/python_django_tutorial_for_beginners_youtubewdg6s.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/gjfGjgs/82048152889.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/CrjbuTB/2657927242.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/hMidpgE/epsxe_for_android_apk_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476015/normal_60046d6808bf9.pdfIn PDF document text
    • http://alex-chekalev.com/how_to_get_your_hardship_license_in_arkansas31oo9.pdfIn PDF document text
    • http://pollsexpert.com/ccna_v6_packet_tracer_answers7ezot.pdfIn PDF document text
    • http://nat-fru.space/applied_physics_letters_template4n05p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496580/normal_5ff0a2bf37a66.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/egcjiOh/82512009608.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/ahejbjb/48022824361.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/bFRdKhd/nuclear_attack_us_history.pdfIn PDF document text
    • https://cdn.sqhk.co/tulotunofuz/5jc9S3v/kokikupipivol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d9e0fb-4214-46ee-99f3-b3c831b004e4/fidalewowuwenerazeboto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92a40db6-9363-43f6-9fa1-e357f36fce95/dark_magician_of_chaos_deck_yugioh_duel_links.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6a578f-3bce-484e-81fc-952bb3ed0f62/how_to_start_small_bakery_business.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00032400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32400 5612 bytes
SHA-256: 976ad9f87390c1e131de107c56da8664279268db7c75873694f7b53f267d92ae
font_01_sfnt_off0003375b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3375B 4552 bytes
SHA-256: 3ec859b87554f7a68e714611a977dced3d8055c4388b930c709a83101057402d
font_02_sfnt_off000346e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x346E9 13160 bytes
SHA-256: 4f12c31a3aa21fab3cae6c3996aef43616f090af1c97d0e22a3e51f068b300b7
font_03_sfnt_off000372e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x372E9 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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