Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed50c272a5a1339d…

MALICIOUS

PDF

95.2 KB Created: 2021-02-15 07:33:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dad4f292d51238b1df69029a58d01e32 SHA-1: 203690e71f37832ad3eb2e992c45d00e72f95737 SHA-256: ed50c272a5a1339dd4931c5c1dcd883df5006fe6f0ecf9a48fce16119265f232
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to the linked URL, suggesting a lure to a compromised website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://crophysi.ru/wix?keyword=massachusetts+bay+colony+physical+features In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451941/normal_602565ad75b9b.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/hhjcjgi/ferogudolotidu.pdfIn PDF document text
    • https://cdn.sqhk.co/bepasasa/jib5TOH/secret_codes_for_cherry_mobile_android.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/glU3zPf/vitezaj.pdfIn PDF document text
    • http://duwivididi.iblogger.org/passport_annexure_h_sample_filled_form.pdfIn PDF document text
    • https://cdn.sqhk.co/bagudivibi/NiejgG2/london_to_brighton_veteran_car_run_2019_photos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_600b24ea836e9.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/je50YQ4/samsung_smart_tv_channel_guide_no_information.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444852/normal_5fec4204c0745.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/ii7hfmP/javaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491688/normal_5fe912448d3d4.pdfIn PDF document text
    • https://cdn.sqhk.co/rifarako/Xjaibie/rowdy_wrestling_hack_apk_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/dmv_va_test_questions_and_answers_free.pdfIn PDF document text
    • http://kibuwigukakew.epizy.com/97952059023.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/7394765121.pdfIn PDF document text
    • http://fujexineduronas.rf.gd/free_editable_agile_roadmap_powerpoint_template.pdfIn PDF document text
    • http://kujuzumofad.rf.gd/refuzatubuwojajutoja.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A08 5352 bytes
SHA-256: 70009a009cac1a6c08ad1eaef39e6e03407ec60b25acc40b37ac937ae342dc6a
font_01_sfnt_off00014c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C46 10268 bytes
SHA-256: eee6a5a5a2be2691bdf9590d16bb8bc618544047337728aadce6396dfced523a

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