Malicious PDF — malware analysis report

Static analysis result for SHA-256 185e053fdbb90055…

MALICIOUS

PDF

86.2 KB Created: 2021-03-28 02:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a989eb86d8bc63a3adc74b02d61da736 SHA-1: c960e0219ede162b1df2329d532b587e5f8581d6 SHA-256: 185e053fdbb90055edc054b8b1ffaa314e76701d1b1d8d7057c4df79c4c83c21
184 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, with a primary link disguised as 'keto foods pdf' leading to malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or scamming purposes. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirector.

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/award?keyword=keto+foods+pdf In PDF document text
    • https://bevabuje.weebly.com/uploads/1/3/4/8/134897483/fosapuxup-lizuduwenabir.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/relaxation_techniques_for_stress_relief.pdfIn PDF document text
    • http://vozivovog.scienceontheweb.net/95870221777.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/seven_steps_to_problem_solving.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/anchored_instruction_theory.pdfIn PDF document text
    • http://mesanezedid.mypressonline.com/distributed_control_system_books.pdfIn PDF document text
    • http://zitirisiz.mywebcommunity.org/how_do_i_unlock_my_whirlpool_washer_door.pdfIn PDF document text
    • http://rowefuzoj.mygamesonline.org/22875194107.pdfIn PDF document text
    • https://tabuwesajusa.weebly.com/uploads/1/3/1/8/131856124/3082221.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/statistics_for_aso_exam.pdfIn PDF document text
    • https://fitijozis.weebly.com/uploads/1/3/4/3/134372299/f84028.pdfIn PDF document text
    • http://rabiwitijif.medianewsonline.com/the_hobbit_movie_download_in_tamil_dubbed_tamilyogi.pdfIn PDF document text
    • https://fozuxuvaporoj.weebly.com/uploads/1/3/1/8/131856883/9978940.pdfIn PDF document text
    • https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/340e534ceb6.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/bowflex_wr30m_watch_battery.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/16996225969.pdfIn PDF document text
    • http://ketenimolupev.sportsontheweb.net/50457558685.pdfIn PDF document text
    • http://wikowezenitezo.medianewsonline.com/foundation_of_computer_science_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gajutar.onlinewebshop.net/zen_meditation_guide.pdfIn PDF document text
    • http://bugazepoja.onlinewebshop.net/loxufej.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001092e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092E 4300 bytes
SHA-256: 6914efb5b477fa4788998e0f2aaa3d6815606923ff0975b01a08cf782e4a9c85
font_01_sfnt_off000117e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E3 11340 bytes
SHA-256: 10224e3e17bc92c08d3c582813042fd89ff9b5d60e6a1f220bd8f7288bfa1093
font_02_sfnt_off00013d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D80 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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