Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dce0d83bfd43ae5…

MALICIOUS

PDF

77.9 KB Created: 2021-03-18 22:36:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 29b911b960827025870e01950f94b615 SHA-1: 0893cc10f6e63ab3af8cfd579cba8339563c31ba SHA-256: 5dce0d83bfd43ae51e2eab5416a84b1424cff0dd18dad047a06b3b92efa4eba6
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains strings related to product listings, suggesting a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/strik?utm_term=yard+machines+21+550ex+oil PDF link annotation
    • http://nomokesus.sportsontheweb.net/download_visual_basic_for_applications_7.1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401525/normal_5fe46fdce7d09.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/jawugorulemid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_602575961bccb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_602422840efda.pdfIn PDF document text
    • http://kamefutebiwef.mywebcommunity.org/zadopimit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379477/normal_5fde68e06357c.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/03889bd1-b7e5-4c36-ae9f-923a9e67427e/binirefe.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/how_to_save_google_maps_directions_for_offline_use__travel.pdfIn PDF document text
    • http://murapimopavopa.myartsonline.com/anthony_giddens_the_consequences_of_modernity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feae0c10-ff87-42d1-8873-da3dcbe2f138/calvin_and_hobbes_snow_cartoons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3e7df6d-67e6-4195-8edc-edf7ee218047/xukujekadetirukojezetug.pdfIn PDF document text
    • http://todojenosefotaz.epizy.com/bollywood_movie_website_top_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28eca179-b4a4-444d-96e5-506c5c2b3ff5/the_norton_anthology_of_world_literature_shorter_third_edition_vol._2_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39ad1204-f3f0-463e-a703-4cca65a963e9/how_to_install_diono_radian_booster.pdfIn PDF document text
    • http://bazofigi.epizy.com/what_can_sociology_majors_do.pdfIn PDF document text
    • http://fokafupu.rf.gd/surah_al_an_am_urdu_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/can_you_zero_a_rifle_at_25_yards.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/xubanifosofu.pdfIn PDF document text
    • http://wadekazu.epizy.com/wow_classic_leveling_guide_alliance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26878826-fe62-4181-b7cc-0211eb1b9eca/dovakuzarirudabaxusesezok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b6a9a01-9bff-491f-a74e-75183b63953f/how_to_get_microsoft_project_certification.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/future_scope_of_project_report.pdfIn PDF document text
    • http://lorasis.epizy.com/formel_areal_sirkel.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/85501096235.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_off0000f0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 5656 bytes
SHA-256: 63cb15f215f114a914007600c66a225f83a45b4a25a49c8a34b49105242cd832
font_01_sfnt_off000103ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103ED 11336 bytes
SHA-256: 0150685da12e022e7fc7dd76e7fe9875ecd8f527b5ec1463999ec8088adad3f3