Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cba1b29bda97194…

MALICIOUS

PDF

70.9 KB Created: 2021-02-12 09:35:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 74c9df311b468ee4ccf8611ebc557398 SHA-1: ce09b7ee3a95f9d79d2251a743064a4fedf82998 SHA-256: 5cba1b29bda97194f18b46848e429139ac193aa2766e618239e6857cd0465bfc
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 link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though partially corrupted, suggests a lure related to 'how to make a triangle with a protractor', which is likely a deceptive pretext to encourage clicking the malicious link. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

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
  • 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/123?utm_term=como+hacer+un+triangulo+con+el+transportador In PDF document text
    • https://cdn.sqhk.co/mibaforetu/jd8VDV6/game_robo_avenger_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/hjbRShf/zamaruwupirag.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/bfhha4v/miyako_rechargeable_fan_price_in_bd.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/hcjb4q3/nice_short_sleeve_button_down_womens.pdfIn PDF document text
    • https://cdn.sqhk.co/nugunexinazo/zjcJjdl/great_little_war_game_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tusujoxaseru/Qidhinr/zerogibeferamoxozaveleta.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/ejcu3gd/hearts_of_iron_5_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/wVjkwja/totaxezorisigizetojav.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/iijOhgM/om_nom_nom_trophy_ps4_minecraft.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/jSTYjgo/89951440487.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/lvB2sii/91904857569.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/ijbjcjf/55851322168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404292/normal_60168a73f0f4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bibalaluroxute.epizy.com/buddha_hoga_tera_baap_film.pdfIn PDF document text
    • http://zubeleboju.epizy.com/81152788126.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_off0000d421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD421 5392 bytes
SHA-256: 5a700d9655be6dd950c2ea4a77b11ae3be168089991a6a492a74fa71d4156d23
font_01_sfnt_off0000e647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE647 11708 bytes
SHA-256: b75008541e2a319bf6a45fb2c8f3ea3e50dc56042b1d46cc098b58971be8175c

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