Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0374bc87f9483f8…

MALICIOUS

PDF

77.7 KB Created: 2021-06-07 15:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b254dd90b7068e6ccdc329165d755eeb SHA-1: c95bd0b310edaf0e227bc5d9922d025528bd5071 SHA-256: e0374bc87f9483f8299e6bf8f83af3718b47a0270b0c36dee557b6034faa2277
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with a primary external URI pointing to 'https://pistant.ru/pbw?utm_term=crossfit+gym+training+program', suggesting a phishing or malware distribution lure. The presence of multiple links on disposable hosting and the use of 'utm_term' parameters further support a deceptive campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://pistant.ru/pbw?utm_term=crossfit+gym+training+program PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412905/normal_60264cf1bf39b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464524/normal_605f599dc9449.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391605/normal_5feb6b4a6ef91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483873/normal_6025aab69259c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383805/normal_600663a8aa8af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372719/normal_5ff9e6d7d1c5f.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4419644/normal_60b73aa04174c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_606e556da7b6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_6018eaed97c6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_6020fd17114c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://togiwuvoze.pbworks.com/w/file/fetch/144608061/physical_fitness_merit_badge_workbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de92158d-5808-4ab0-bcb6-683271c31f60/hack_de_parchis_star_apk_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdaff80b-1c9e-419b-9f27-99bcaa9341e2/sekakoletigetuvuni.pdfIn PDF document text
    • http://febigadeviti.pbworks.com/f/fresh_fire_prayer_ministry_donate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a88700-8fe8-4a47-b0b3-89e73ce5cc01/anak_okey_plus_ip_hilesi_2020_apk.pdfIn PDF document text
    • http://mogulobobis.pbworks.com/w/file/fetch/144674055/answers_to_math_problems_with_work_shown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d139040-31e5-4c09-9940-b42551312e39/other_form_of_passive_voice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/817b5b7e-e6b0-47c1-ad13-0eac2155d79f/56202799029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec12972-2564-49bf-b7f7-a969d7d5dfc2/defensive_driving_texas_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9824df8e-c744-48d9-a235-9072705eaea4/vetapenuvojorun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ece1db1-022e-4d96-b8f4-6d231bb4547c/51503961680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0613d4e-4327-49d2-9092-e84a5173d194/chemistry_for_changing_times_14th_edition_free_download.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/w/file/fetch/144663060/baahubali_2_tamil_movie_free_download_in_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e7a939-0c32-4f98-ba73-702fa5b41d82/vadariserugiwiwel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db5f854-2bcc-4043-8edd-7b50f71c105e/letupawitebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759645ee-5562-4537-b25a-e2a1acf35d76/nufewila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e66ee2dc-72aa-473c-bd52-4a6c421c10c0/how_to_figure_out_a_15_percent_tip.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_off0000efc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC0 5196 bytes
SHA-256: 290e3d0ca5c5a05735176fc8cd0651f2065418a56ffc48ecb3c002d605753c93
font_01_sfnt_off0001015b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015B 11336 bytes
SHA-256: c67fd40680f1d989cc691b147b7ade3c966b430c2c47054ea3e2933bc3a040a9

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