Malicious PDF — malware analysis report

Static analysis result for SHA-256 8388608fbbf6e480…

MALICIOUS

PDF

79.3 KB Created: 2021-03-22 12:15:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 278d8eca51949995ceb2171a331baca0 SHA-1: 3211a50f0817bf5d084e497269a92f633202d727 SHA-256: 8388608fbbf6e48083efde48458694e637e9539bc29f355a636dc575d1400210
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to link farms and disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/wix?keyword=subnautica+place+moonpool PDF link annotation
    • https://cdn.sqhk.co/mizipudi/cJFjeTR/downhill_mountain_bike_race_france.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484639/normal_603595a2ef987.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/cashier_resume_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/ggcUheH/retro_fridge_freezer_with_water_dispenser.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/hchbieG/lobamefunaliburi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459631/normal_5fcc00f79fb75.pdfIn PDF document text
    • http://fukijuwevo.getenjoyment.net/sat_prep_courses_bergen_county_nj.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/ii4iciC/91741014780.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/8dvhhmF/nutritional_value_of_bitter_leaf.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/e9IKbL4/i_remember_mama_full_movie_online.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/IO76Wih/savuvanepomadexopam.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwifemi/nghfwep/cartoon_video_status_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/numorolele/fgflhhb/mathletics_student_book_series_e.pdfIn PDF document text
    • http://sakivometo.medianewsonline.com/82773600749.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/do_foster_parents_get_paid_in_arizona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2edf92d7-a8a3-4b12-b852-a7b514914f95/gaguputaxunupobisedowofed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2241fff-c307-4d93-b4f8-1d40013cd896/what_is_the_formula_for_surface_charge_density.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199706ef-a770-4219-b2c7-4027f1d84118/what_is_lean_six_sigma_black_belt_course.pdfIn PDF document text
    • http://jibimom.myartsonline.com/jakaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c06fea0-f528-4974-ada7-ad1a46cfbf29/fufitofosetozujumarulux.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/91592137151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965628f4-2ba5-43ab-82a1-4cd3f2065b0a/laptop_ram_repair_near_me_macbook.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/senabadibife.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/how_to_change_polar_to_rectangular_on_ti_84.pdfIn PDF document text
    • http://mizetum.onlinewebshop.net/33978069857.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_off0000f7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F2 5048 bytes
SHA-256: 762f6dabed2f0b6f6652c605e5a2019f9bcccdc2419ff0cf488081809ad638d0
font_01_sfnt_off00010910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10910 10776 bytes
SHA-256: ab6b1f57998e78dfb544cb6111de7609b61a611f4637e1eee5eb7f061e029865