Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8080f47b2fcb2e…

MALICIOUS

PDF

74.1 KB Created: 2021-01-19 16:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e61e2402c2331f883b17e550bde8da4e SHA-1: bab09c5ed58b4d251c8fd03194e110c0db9a186d SHA-256: da8080f47b2fcb2ec8a7d9c7910f94ce315886310adda10137491bec9a7e0244
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicating a high likelihood of malicious intent. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the structure suggests it's designed to redirect users to potentially harmful external sites, possibly for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://bologen.ru/123?utm_term=la+fitness+stoneham+instagram PDF link annotation
    • https://site-1221887.mozfiles.com/files/1221887/simple_arduino_projects_with_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414334/normal_5fe0fd8f93a6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493888/normal_5fe92dbc46fbb.pdfIn PDF document text
    • http://gekalam.22web.org/30906709601.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/aBGZhbM/jawudujiket.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/lNjhBHt/scent_of_a_woman_movie_perfume.pdfIn PDF document text
    • https://site-1173169.mozfiles.com/files/1173169/697694030.pdfIn PDF document text
    • https://site-1192273.mozfiles.com/files/1192273/nazur.pdfIn PDF document text
    • https://site-1176512.mozfiles.com/files/1176512/dice_to_go_tabletop_rpg_roller_coaster.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479210/normal_5fdc05914fcda.pdfIn PDF document text
    • https://site-1173807.mozfiles.com/files/1173807/free_streaming_country_music_videos.pdfIn PDF document text
    • https://site-1172118.mozfiles.com/files/1172118/jofizubel.pdfIn PDF document text
    • https://cdn.sqhk.co/ketejeti/GrRsCja/the_maze_runner_2_movie_wiki.pdfIn PDF document text
    • https://site-1172884.mozfiles.com/files/1172884/tosadixivarizesazobovoxev.pdfIn PDF document text
    • https://site-1230881.mozfiles.com/files/1230881/daily_planner_template_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/tovizabep/idiciiK/fsa_commuter_benefits_covid.pdfIn PDF document text
    • http://jibinomazovujug.22web.org/nimisimuterev.pdfIn PDF document text
    • https://site-1175676.mozfiles.com/files/1175676/champion_brickwork_jobs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rexenejo.epizy.com/starbucks_menu_nutrition_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/lijemaxudidova.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/happy_birthday_greetings_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/99462255296.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/slope_intercept_form_of_linear_equations_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/39445730679.pdfIn PDF document text
    • http://redepulevinevux.epizy.com/fawimitukuroxixigaziwo.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_off0000e406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE406 5088 bytes
SHA-256: cee92876cc9eae4f3caf28213aa84682d0e86e1b237dbd5a73ef5bcc8045aa8c
font_01_sfnt_off0000f533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF533 11068 bytes
SHA-256: 52c686a3fd19881951d91d3d06cbe512659934297f14f7358738a9222fcf7a91

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