Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3ef8b643aa12e4…

MALICIOUS

PDF

76.7 KB Created: 2021-02-26 21:27:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bc0bd88e3add616e88791fdd8991ba57 SHA-1: 9bef28e30b41b71eff0245ab365f72b2122e0418 SHA-256: 2f3ef8b643aa12e45551903c4fab983ec7fc2ac1ac65a86893e97c7eb7f933a0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm strategy, suggesting the document's purpose is to drive traffic to potentially malicious sites. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/award?keyword=isound+bluetooth+speaker PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499283/normal_6017865c065da.pdfIn PDF document text
    • http://satomupudogoni.22web.org/bukusufudinuna.pdfIn PDF document text
    • https://cdn.sqhk.co/gabogivoxavi/WOlhihg/43851074264.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzaxube/hcnLIjh/kodaxisunusa.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/eid1ha8/30824452775.pdfIn PDF document text
    • https://cdn.sqhk.co/todusukiraxi/igX3ibD/heavy_bike_racing_highway_rider_moto_race_track.pdfIn PDF document text
    • https://cdn.sqhk.co/xagogudexo/ihaJBVT/kabir_singh_rock_music_ringtone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/gficyvO/spyro_2_ripto_s_rage_ocean_speedway_orb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423443/normal_5fe063a5bf205.pdfIn PDF document text
    • http://nisaledax.iblogger.org/physical_properties_of_metals_and_nonmetals_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/iiVKjas/voltage_drop_formula_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/potonefamuve/9Tgc1he/birdy_grey_chicky_convertible_dress.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/kgjKBid/world_cameras_live_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tikobonojaxax.epizy.com/cursed_item_generator_5e.pdfIn PDF document text
    • http://tumofif.rf.gd/34812929466.pdfIn PDF document text
    • http://xodemomawul.epizy.com/bridgeton_public_schools_salary_guide.pdfIn PDF document text
    • http://ferurexage.epizy.com/95348196775.pdfIn PDF document text
    • http://fivajopafovile.rf.gd/anari_song_video.pdfIn PDF document text
    • http://wekumut.epizy.com/convert_csv_file_to_parquet_format.pdfIn PDF document text
    • http://mokineso.epizy.com/honing_guide_nz.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_off0000f117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF117 5188 bytes
SHA-256: 2863168d34d3db68d1fdc636d137da9a5e0b449ea3812bc55e4fdc43d7559e09
font_01_sfnt_off000102a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A1 10280 bytes
SHA-256: 2367fc3ded7dbbc78a60f7d15df73f90d7abee9de8dab93c3dfbf47c0be380f7

Open this report in the interactive analyzer, or submit your own file for analysis.