Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd3054c2394744d…

MALICIOUS

PDF

78.9 KB Created: 2021-03-20 11:06:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 54f46137856610ed55a741af4f72d37e SHA-1: fc0918f3f99d2205d72e436f5efeb34ee724b0f4 SHA-256: 2fd3054c2394744da4da646962d1ffbdfde795509da2f952833814ac37e9bdef
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one prominent URL being `https://jottigo.ru/123?utm_term=laughing+baby+video+clip+free`. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a 'laughing baby video clip'. No scripts were extracted, but the PDF structure itself is used to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jottigo.ru/123?utm_term=laughing+baby+video+clip+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453730/normal_603b11e80cc24.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/icja93G/22761049082.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/how_to_write_an_essay_on_organisational_structure_in_business_planpdbee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484632/normal_60434df07742b.pdfIn PDF document text
    • http://fb-pageunderreview.com/red_queen_book_3_age_rating4074v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451927/normal_5fd0ec3e10108.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/51543102084.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/Kgf003p/beach_trip_bucket_list.pdfIn PDF document text
    • http://bulakirip.getenjoyment.net/buwelaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459027/normal_600c98b9b85e6.pdfIn PDF document text
    • http://bugexavitikuv.22web.org/74965975498.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/iiLDEZC/61969229428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410730/normal_6052f2e8bf189.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
    • https://s3.amazonaws.com/jojitagifuva/reading_plus_answers_level_history.pdfIn PDF document text
    • http://vidilig.onlinewebshop.net/wapivabupetejaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/beyblade_burst_app_5._2.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/whatsapp_status_telugu_love_failure.pdfIn PDF document text
    • http://gorefoverotiw.epizy.com/70869546645.pdfIn PDF document text
    • http://kowotasube.epizy.com/zamojuvaresemo.pdfIn PDF document text
    • http://zifezuv.rf.gd/colors_in_spanish.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_off0000eb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB88 5284 bytes
SHA-256: 0d23bb6b0072d0a0ae5f61145536c8ecfc241daabda89f251f2909073846d914
font_01_sfnt_off0000fd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD79 10212 bytes
SHA-256: 2c06321d725b6b01d216abd7122381eaab9c6887a3b5f303b5461e5909b20f99
font_02_sfnt_off0001207f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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