Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d3456da6427f461…

MALICIOUS

PDF

85.5 KB Created: 2021-03-11 07:52:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c6c29ec35982022c809ba8c7b2a1c5e8 SHA-1: 5091a94805b49a8c75184b8d99c1d34f0183f79f SHA-256: 7d3456da6427f46178d97f72fab381fe82ee06dc454b5e372fe4fccf236ec0b0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/123?utm_term=lubridate+cheat+sheet PDF link annotation
    • http://sugameloxufe.mywebcommunity.org/92252272136.pdfIn PDF document text
    • http://xolimaked.iblogger.org/59916718594.pdfIn PDF document text
    • http://jigapenufi.medianewsonline.com/38811691231.pdfIn PDF document text
    • http://wotimijivebizu.iblogger.org/jaxetokulamuguterofe.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/lomigevezuzo.pdfIn PDF document text
    • http://luxomozuk.mypressonline.com/radiation_heat_transfer_modest.pdfIn PDF document text
    • http://fibiver.mygamesonline.org/sofavugamo.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/11983229499.pdfIn PDF document text
    • http://fasoxuxesatilu.sportsontheweb.net/what_types_of_interior_design_styles_are_there.pdfIn PDF document text
    • http://tiriruno.sportsontheweb.net/how_to_write_a_song_on_piano.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/python_book_in_hindi_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozafawuronixe.epizy.com/72740291877.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/45179067711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be2130b-9c9c-449e-b407-6a22a50c44cd/11994682945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c7847d-4a86-499a-9f9a-42706e98c2ca/how_to_change_a_liftmaster_garage_door_opener_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b2ca5b9-11ae-4cc9-a498-31ed55da94b3/how_to_score_perinatal_anxiety_screening_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39cf959c-91af-47a3-a4e2-79d37f546a51/gimivagosub.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/98021946113.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/erdas_imagine_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d36b5e2-a5c7-4bb9-8980-3965b4c6548b/32789829406.pdfIn PDF document text
    • http://wajutomagavugaz.epizy.com/english_speaking_tips_in_tamil.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_off00010f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F37 5076 bytes
SHA-256: c2f67ac827e2a2248aed372ecad7aa90880e7fef89517c14c077c034842a443c
font_01_sfnt_off0001206e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206E 11432 bytes
SHA-256: f23c117f15e44957b76886ebfa69f7a76a11aa6647a937a832a0ca36809bd9bd

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