Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c018b24b98a626…

MALICIOUS

PDF

77.6 KB Created: 2021-03-26 08:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 672a5a04c2db10d341f317a6ade25439 SHA-1: 063590973865e11cd2fdd5e40a13a929b0c4957d SHA-256: 09c018b24b98a626528e9956288f115805a38bab046e103634e97ab7c7895b0b
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with a primary suspicious URL being https://golowaki.ru/wix?keyword=flight+2+unblocked, suggesting a phishing or scam attempt. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM further supports this by indicating the PDF is part of a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=flight+2+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488335/normal_5fd814dfdc7e3.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/hqFhhpA/4979396343.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426080/normal_600512240bb15.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/hhijhjD/fiben.pdfIn PDF document text
    • https://cdn.sqhk.co/kowaziwaso/6fFhfhh/26924317411.pdfIn PDF document text
    • https://cdn.sqhk.co/diduwuposenu/iEDEjbU/breakout_ultimate_brick_breaker.pdfIn PDF document text
    • https://vatovuturok.weebly.com/uploads/1/3/1/8/131856009/nofagozolamo.pdfIn PDF document text
    • https://mumovukejepi.weebly.com/uploads/1/3/1/4/131483147/jilidume.pdfIn PDF document text
    • https://bugusurev.weebly.com/uploads/1/3/4/6/134615575/teluwimutemogened.pdfIn PDF document text
    • https://falevuwutote.weebly.com/uploads/1/3/5/3/135301590/vokixew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481830/normal_605b45cf36d8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_6033472c5b80c.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/6a247c81-36e2-42da-b41c-af70a25769d6/opening_to_the_neverending_story_3_dvd.pdfIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_f70fa5fa998e4b03a74ec28b9ba7dda3.pdf?index=trueIn PDF document text
    • http://rukukuwozar.epizy.com/69926368278.pdfIn PDF document text
    • http://perepidowowavam.epizy.com/business_model_canvas_excel_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/becd26a9-e6d0-4d01-b323-228952ea0545/54593282824.pdfIn PDF document text
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_241ccf7f46ef4bdaa835a4e8717aca43.pdf?index=trueIn PDF document text
    • http://janoxifi.epizy.com/sukaviroguwab.pdfIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_ca40e6842ee1478d8db7841426131906.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6054886a-112f-43dc-9f7e-998c946c39b3/zanotiwuwudevilogo.pdfIn PDF document text
    • http://wiwowefitupek.epizy.com/laxanisako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/905cd909-43b2-45b9-b6bd-70fcac23abc7/richard_iii_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5d9864-dfaa-4aad-9fbd-30567cee21ec/how_to_assemble_a_karcher_k4.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_off0000f086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF086 5008 bytes
SHA-256: dd3146143a14b6942a6ff999507259bd5d2f72e05ca560a1c11ecf44dd492001
font_01_sfnt_off00010197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10197 11096 bytes
SHA-256: 1c698d8361ba2d7f9b78dbb9dcf5ee63744a8e931d9d1217ddd4861f18a8a077