Malicious PDF — malware analysis report

Static analysis result for SHA-256 3024e6e0a02c7c5a…

MALICIOUS

PDF

75.3 KB Created: 2021-03-27 18:46:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 68df0ace6532c6691e3e4720c8484693 SHA-1: 1caf443168375ca18912a7d51928ce55c24c2b99 SHA-256: 3024e6e0a02c7c5a7762f760b7a4ba4d2c601508992e674621e760cf94e44eaf
134 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 payload. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it's part of a link farm designed to obscure malicious intent, with a primary external URI pointing to a domain associated with a 'pdf converter' lure. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/award?keyword=pdf+converter+combine+online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417039/normal_6006b110980de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_6022c6e0bc896.pdfIn PDF document text
    • http://bigezidara.mypressonline.com/5th_grade_spelling_words_list.pdfIn PDF document text
    • http://nijaxubazaziw.mypressonline.com/kofenegazise.pdfIn PDF document text
    • http://wide-take.top/fipisibajorimuvezevavukgte.pdfIn PDF document text
    • http://adanakebap.org/el_dictador_y_sus_demonios_librocjvzy.pdfIn PDF document text
    • https://gitujibexilen.weebly.com/uploads/1/3/1/4/131406430/1067043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453747/normal_6045bc858b7c0.pdfIn PDF document text
    • http://paypallsecurity.com/how_do_you_use_a_bissell_proheat_powersteamer1s06v.pdfIn PDF document text
    • https://lulapusorifat.weebly.com/uploads/1/3/1/4/131436971/57b1c31312dbd.pdfIn PDF document text
    • http://sodalabs.club/51232491469ah51i.pdfIn PDF document text
    • https://naluzamuro.weebly.com/uploads/1/3/4/5/134516405/damufowisa.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/pizexolule.pdfIn PDF document text
    • https://velalozelo.weebly.com/uploads/1/3/4/4/134498802/bb050.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zusagijumetuze.epizy.com/zorez.pdfIn PDF document text
    • http://ladorum.epizy.com/what_is_agile_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15360762-702a-46b2-ad17-d8501f488dc4/how_to_clean_samsung_water_filter.pdfIn PDF document text
    • http://forojiwimudobo.atwebpages.com/what_is_the_main_goal_of_the_sentencing_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b001beca-d26d-4675-af07-9afb96559b84/12032255357.pdfIn PDF document text
    • http://kikegapel.epizy.com/bullet_journal_template_pages.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_off0000e8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C0 4980 bytes
SHA-256: 54ca803672d8f48deeb78c6eb0568bba619df21ce446f0b3d520902df780edb6
font_01_sfnt_off0000f9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A9 10804 bytes
SHA-256: af4fe08189b8a85b549feb64bdc514828b3ece98da698e16ca45ad942807677e

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