Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e381dd5517e8a2…

MALICIOUS

PDF

81.5 KB Created: 2021-03-14 02:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7a94852445d937044ace1061058a611f SHA-1: 23645bdfb4ac4d205fe37fd792708e7306afdb30 SHA-256: e2e381dd5517e8a2c5a1c0eba84245828ca3a1609dd8752d83563f0db174aa7f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary suspicious URL identified as https://golowaki.ru/strik. Heuristics indicate this PDF is part of a link farm on disposable hosting, and ClamAV detection confirms it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/strik?utm_term=what+is+the+text+structure+of+the+second+paragraph PDF link annotation
    • http://setixin.iblogger.org/50588378717.pdfIn PDF document text
    • https://cdn.sqhk.co/lilajibusizu/hcidhcs/pyara_bhaiya_mera_dulha_video_song.pdfIn PDF document text
    • https://cdn.sqhk.co/xaderimi/jdXjgFv/gimijerisime.pdfIn PDF document text
    • https://cdn.sqhk.co/litonesi/jj37ihR/can_you_escape_50_rooms_11_level_37.pdfIn PDF document text
    • http://modebedunizux.iblogger.org/60515223325.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/sotoselafepemixe.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/ggNfVjc/minecraft_rlcraft_dragon_eye.pdfIn PDF document text
    • http://mofobawosenej.mygamesonline.org/89271727344.pdfIn PDF document text
    • http://zuwixegugul.22web.org/architectural_draftsman_job_description.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/1679008e-0710-439d-b087-d777c33a22d5/the_chronicles_of_narnia_movies_online.pdfIn PDF document text
    • http://givixoburux.epizy.com/claris_vs_105_weight.pdfIn PDF document text
    • http://nuzavaxevarap.epizy.com/trauma_abdominal_abierto_y_cerrado.pdfIn PDF document text
    • http://wipibefab.onlinewebshop.net/adapted_books_for_english_learners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ba7d705-322b-4b1d-99eb-8d87a7ca92a3/musexiwosumilexelamurixu.pdfIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_0f0ad7b0e6264d2c8b105bea4f7aace1.pdf?index=trueIn PDF document text
    • http://kisalonokexiwi.atwebpages.com/how_to_add_and_subtract_radicals_with_exponents.pdfIn PDF document text
    • http://dokidakalivuwel.rf.gd/fofowiwifipixutepogomek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b32b4d3-3b46-470d-92fb-ab125d2f532f/deepak_chopra_quotes_path_to_love.pdfIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_342c22238815413b8c7b8bf61737a2d9.pdf?index=trueIn PDF document text
    • https://32e47638-7206-44c1-ad53-5c6f9176402e.filesusr.com/ugd/e00742_4d62a265a94343598b5b59d3bb0b15ff.pdf?index=trueIn PDF document text
    • https://0108a07e-94d6-443d-bfa7-575dd38852ad.filesusr.com/ugd/756a01_477566bd0b90400f970fd41bd9c43aea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/61f4a1ca-b514-4651-8030-ea8f8a1a3bb4/bugaboo_frog_seat_cover.pdfIn PDF document text
    • http://lafebevu.rf.gd/rexisir.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_off00010091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10091 5468 bytes
SHA-256: 44297ee066fca8ed77cc7157ee2e21295a9f22d15a601cdad9227fc921ceb383
font_01_sfnt_off00011338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11338 10820 bytes
SHA-256: 4af8f31da1626ec01988aa83bdbd9ced992afb14f8b8cc47f8e28e9fc6d0498f

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