Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a69239fa006e46…

MALICIOUS

PDF

99.8 KB Created: 2021-02-22 18:12:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ce2fa252d6659893f3ce28540178635c SHA-1: 245b93f73a3ba5448f949e2dfe409fe91da98e97 SHA-256: 56a69239fa006e4638464f3efac76e47b76c54ab89018231319c8aa2ae4be838
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains references to search terms and product names, suggesting a lure to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=baby+bjorn+bouncer+australia In PDF document text
    • http://optamorem.com/wufasezoselateek8mc.pdfIn PDF document text
    • http://ratebekanolaja.22web.org/ham_radio_technician_study_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370269/normal_5feb4b4e4c029.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/ifJyTjg/bike_race_game_app.pdfIn PDF document text
    • http://gigurokubi.66ghz.com/define_cavernous_malformation.pdfIn PDF document text
    • http://erogan24.website/12th_street_rag_guitarrgflw.pdfIn PDF document text
    • https://cdn.sqhk.co/kufejeni/gcO3rP2/dozok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474176/normal_5fec2ff4a1e26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391903/normal_5fc9ac6b8d5bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417213/normal_5fd1e11d61cc1.pdfIn PDF document text
    • http://btsworld.org/zesezisatilumogvodp5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383929/normal_601b28ed10de5.pdfIn PDF document text
    • http://vadusulu.iblogger.org/donald_duck_meme_template.pdfIn PDF document text
    • https://cdn.sqhk.co/bozawenibiwa/fhiib97/26288249977.pdfIn PDF document text
    • https://cdn.sqhk.co/jaguwubax/hdG4gdu/mujaxuxokep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477620/normal_5fedd85e2eb82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454171/normal_6027760e665c3.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/Llf1Mjd/76886471004.pdfIn PDF document text
    • http://youla-24.cc/6906915922nacec.pdfIn PDF document text
    • http://nufarelarapo.iblogger.org/10_examples_of_spreadsheet_software.pdfIn PDF document text
    • https://\\\/babybjorn.imgix.net\/app\/opplastinger\/2017\/09\/babybjorn-d��rvakt-bliss-svart-bomull-006016-001.png?auto=formatIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/nodasuzelurix.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/architectural_drawing_books_for_beginners.pdfIn PDF document text
    • http://zoxedoronavo.epizy.com/canvas_printer_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/staff_appraisal_forms_child_care.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/mekikusodarajinexiba.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_off00014844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14844 5160 bytes
SHA-256: a04e3946096e7a16d162a0295207d9e096c68400fe0a552e0766b9bda1433f00
font_01_sfnt_off000159e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159E8 11412 bytes
SHA-256: bf63296426a5ca060d610fa1d780a8e6899ce0c96194919d19b3c8518334926b