Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f587be196b2782…

MALICIOUS

PDF

76.9 KB Created: 2021-04-01 12:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 017f47f9ec96aec80a0b73672a7a81c0 SHA-1: 2c221cc09c781a9db81759953b603b92deea1a57 SHA-256: 00f587be196b2782c550b001cdb29b8233b33a6aa10aca1c3890cb52366e167c
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it functions as a link farm, directing users to numerous external, potentially malicious, websites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm heuristic point towards an attempt to redirect users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://tipofeliluget.medianewsonline.com/dopew.pdf In PDF document text
    • http://dogalijun.scienceontheweb.net/9307529555.pdfIn PDF document text
    • http://roxetoxuved.mywebcommunity.org/pdf_to_word_converter_enable_editing.pdfIn PDF document text
    • http://tekeriset.iblogger.org/how_to_fix_a_garmin_watch_band.pdfIn PDF document text
    • https://cdn.sqhk.co/sufiwotag/75jbgco/airplane_drawing_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/vidikusupegu/S0igjd3/paper_racing_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/ivhbOie/jegevovokoteja.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/adaptive_radiation_in_marsupials.pdfIn PDF document text
    • https://cdn.sqhk.co/pimabosi/hSZggdU/3595737686.pdfIn PDF document text
    • https://cdn.sqhk.co/batitiviz/hfdkESP/shooting_zombie_games_unblocked_hacked.pdfIn PDF document text
    • http://larumutul.getenjoyment.net/que_es_el_assessment_center.pdfIn PDF document text
    • http://sarawavenudiwap.mygamesonline.org/ramonirawegaved.pdfIn PDF document text
    • http://nexagufobutuf.22web.org/how_to_write_an_8th_grade_book_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/G1IkLG9TFNM/wb?keyword=does%20burger%20king%20do%20no%20bunPDF link annotation
    • https://s3.amazonaws.com/mavixu/what_is_the_song_love_myself_really_about.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/tomuzexubajivuselave.pdfIn PDF document text
    • http://mojajigutomikew.rf.gd/85135763739.pdfIn PDF document text
    • http://doritiwenoxa.onlinewebshop.net/39150331828.pdfIn PDF document text
    • http://guxejusoselota.myartsonline.com/south_america_major_rivers.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/nomalepiximatatisolulib.pdfIn PDF document text
    • http://nevabaza.atwebpages.com/ms_excel_shortcut_keys_gujarati.pdfIn PDF document text
    • http://tijojem.rf.gd/nys_common_core_standards.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_off0000f131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF131 4956 bytes
SHA-256: 5cac3c38439c06b74f42899ae37cedb486100cd887f11437bfe6af36905b8ab0
font_01_sfnt_off00010221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10221 10716 bytes
SHA-256: 375ab64512e24b239468d06a4f79257a4c55056e3cac7c28cd3d32509a3bacd6

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