Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c3794e77f208908…

MALICIOUS

PDF

191.2 KB Created: 2021-03-16 09:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e9fcec4320c7c655f0b317714194e133 SHA-1: 24a1cecfe84ba092290ec39e79c11af36bff5169 SHA-256: 0c3794e77f2089082e9bf4109dbe3929944fa9c8b79b1689b1bc4a24e66ac0a5
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics, including ML classifiers and ClamAV, as malicious and phishing-related. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • 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://soxebez.ru/strik?utm_term=every+living+creature+dies+alone+meaning PDF link annotation
    • https://sixalusizefew.weebly.com/uploads/1/3/1/3/131378898/gusun.pdfIn PDF document text
    • http://leon-stavki.info/xixunuribozururas7hapf.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/31722592214.pdfIn PDF document text
    • http://dreabling.online/56982066711xi4b0.pdfIn PDF document text
    • https://mokovudome.weebly.com/uploads/1/3/4/5/134598928/1345034.pdfIn PDF document text
    • http://teenagetutor.online/bse_odisha_9th_class_bookqyzng.pdfIn PDF document text
    • http://megahit.space/wimowiysb5z.pdfIn PDF document text
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/8431565.pdfIn PDF document text
    • http://4gusevshop.space/12687600240t1v7h.pdfIn PDF document text
    • https://wawumojobov.weebly.com/uploads/1/3/5/3/135323155/bafalef.pdfIn PDF document text
    • http://erogan-columbia.site/it_technician_salary_in_kenyay20lx.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/fuzapemudizipuwo.pdfIn PDF document text
    • http://urro-hu.com/what_is_meant_by_the_book_of_life96xm8.pdfIn PDF document text
    • http://bettermoneytips.com/biome_climatogram_worksheet_answersxiiky.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/fifabet.pdfIn PDF document text
    • http://dvigatel.guru/standing_stones_ac_valhalla_gloucestershire46ond.pdfIn PDF document text
    • http://biomanix.best/java_interview_questions_for_5_years_experienced_testersvez50.pdfIn PDF document text
    • http://ecoterritory.store/abbaigaru_audio_songs_ing_comeza3i3.pdfIn PDF document text
    • http://thailandlove.site/xalutozexirufexebuniguped2kqu3.pdfIn PDF document text
    • http://luxshop21.site/98121492506eaiv3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/07eb5d0d-d403-4eba-b618-15254dc51212/how_to_earn_money_by_selling_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f11ba18-f475-47cc-bdcf-96eae66b3cc6/nabemajixafufirig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/701dc515-3fa6-410b-9675-69db5c043610/junji_ito_anime_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1062f4c5-0d7f-4738-83f5-3f85681eb210/58170175821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed69fc28-02d3-4d47-9bcd-afbfe6c0736e/77373785986.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_off0002b692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B692 5380 bytes
SHA-256: 43fb1d61ea6563b0ce4c6fe6dfcdf1b6262b61b471f54baefd2df5dc799301a1
font_01_sfnt_off0002c8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C8D8 11428 bytes
SHA-256: f8991e290c96e577a04e32127a226a3f7a1519a3ef67d09bd1400a4315941a91

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