Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8247c8432d9812…

MALICIOUS

PDF

85.9 KB Created: 2021-02-19 06:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ea14c24d42dfffaa9868fb75ab11d3e2 SHA-1: 20ba7c239851b21c74183927437fc98aa029b77a SHA-256: ee8247c8432d98128806296d694c2b74faccf34ee247732c606a15a6aa86f94c
224 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of a 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests a common tactic of using password-protected archives to bypass security controls, further indicating malicious intent. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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=temas+para+ensayo+comparacion+contraste In PDF document text
    • https://static.s123-cdn-static.com/uploads/4372383/normal_5ff2809cf1483.pdfIn PDF document text
    • http://berkeciftci.net/global_reporting_initiative_g4_sustainability_reporting_guidelinesdw7o3.pdfIn PDF document text
    • http://1fps.ru/42784076806tuhdz.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/igeiduy/3d_basketball_wall_light.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416149/normal_60224c4cd9b87.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/NEgdUib/five_nights_at_freddy_s_toys_action_figures.pdfIn PDF document text
    • http://juwijosij.iblogger.org/namita_agrawal_odia_jagannath_bhajan.pdfIn PDF document text
    • https://cdn.sqhk.co/raserijene/hdEm5jh/vasuvuzezetozojuki.pdfIn PDF document text
    • http://vorofagup.22web.org/canada_tourist_visa_application_form_sample.pdfIn PDF document text
    • http://realnoe-obshenie.online/online_converter_indd_to_idml_freedt15b.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/gdhihcg/ark_survival_evolved_ps4_update_2._35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://salulasalanegox.rf.gd/colorimetric_determination_of_phosphate_lab_report.pdfIn PDF document text
    • http://tutapivemaki.rf.gd/sample_inventory_report_format_in_excel.pdfIn PDF document text
    • http://jefebewo.epizy.com/baaghi_1990_movie_video_song.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB4 5096 bytes
SHA-256: e2cd6ac3b8c21927b739b20a10b88c91d0ff791c2321d6c0081cec81ae0d4475
font_01_sfnt_off00010cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF3 12524 bytes
SHA-256: e0e48278fcc1d374a54d389341f67ded4e37876a1a4e862d1baa744da591c69d
font_02_sfnt_off0001363b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363B 16028 bytes
SHA-256: ced8b21f0c91c47eb2a8e10a251844195ecd6fd413d2ce9a64032c85f057f195

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