Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec7a77e427c9d49…

MALICIOUS

PDF

83.8 KB Created: 2021-03-20 06:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c884ec205f1669317ef844553071e7f SHA-1: 78acc0ac98bf73918861f3e08e20606d7626e074 SHA-256: 6ec7a77e427c9d4912ac50b5557f416d9d02c5ea0fbae46c3961495c9e50c47b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on `sqhk.co` and `weebly.com`, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/award?keyword=toyota+motor+manufacturing+case+study+pdf
    • https://cdn.sqhk.co/vubiwete/jeghlge/pixel_pirates_eso.pdf
    • https://cdn.sqhk.co/madilaxetevo/xgcNeYZ/flag_football_referee_positions.pdf
    • https://cdn.sqhk.co/vadetegubufo/8mdj2UF/wazabofaxurijoguvawimo.pdf
    • http://tometifo.getenjoyment.net/airwell-fedders_ac_age.pdf
    • https://dawipufa.weebly.com/uploads/1/3/3/9/133986453/2770394.pdf
    • https://cdn.sqhk.co/jemitaso/hjVRhdW/63251057154.pdf
    • https://cdn.sqhk.co/kenalutaxi/fN0JKjc/vagemadanodonefas.pdf
    • https://kuxijixa.weebly.com/uploads/1/3/4/8/134856984/kiludekasokat.pdf
    • https://cdn.sqhk.co/pulizojiwim/kTnTBfU/scared_jeremy_zucker_piano_sheet_music.pdf
    • https://doxefifuz.weebly.com/uploads/1/3/0/9/130969363/seluluko.pdf
    • https://fosozofafeg.weebly.com/uploads/1/3/1/8/131856121/2203253.pdf
    • https://cdn.sqhk.co/dasofuduveje/ihgh9Zj/rolling_sky_monster_city_download.pdf
    • http://xedanono.iblogger.org/boy_scout_camp_menu_planner.pdf
    • https://namonivet.weebly.com/uploads/1/3/4/4/134493383/nuwenuzokipe.pdf
    • https://cdn.sqhk.co/vameduvide/0hbjff5/unwanted_experiment_apk.pdf
    • https://cdn.sqhk.co/nowonipewo/jiFZWie/temevugujavak.pdf
    • https://cdn.sqhk.co/lokutibu/idicimx/72073456356.pdf
    • http://dosijefa.mypressonline.com/renters_lease.pdf
    • https://cdn.sqhk.co/xumesapaxoku/geaFzX8/jotibexus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fajazimigig.atwebpages.com/pasiveta.pdf
    • http://kivutivepew.rf.gd/22995593785.pdf
    • http://nozoxofepek.rf.gd/72798181870.pdf
    • http://biwosagamivi.myartsonline.com/japofogasumazaw.pdf
    • http://xonifovozub.epizy.com/brochure_template_microsoft_word_2007_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a93.bin
febab4c5374b5b2be0aa2ad18be9d822cd6fee3277b8cefad39a0b4e56db3c3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A93 5496 bytes
font_01_sfnt_off00011d3d.bin
06b9b3f4f42c1ff926bd8f970305ab4601666e74c18c434d6c5b239272f08a7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3D 10768 bytes

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