Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a68412ee0abc1fa…

MALICIOUS

PDF

76.1 KB Created: 2021-03-05 16:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 152f5facbec6bd513e7ecc546800b845 SHA-1: 8b4d3c096ef81bc14bd886767b24064055e82494 SHA-256: 0a68412ee0abc1faf879c5535b6547ff04a982624e0ed0d0e7b7593b8fd6f0f2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous embedded URIs, including suspicious domains like 'jacksth.ru' and 'rte-ita.fun', suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain metadata related to its creation, but no direct instructions or lures are discernible.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=how+to+repair+honda+civic+hybrid+battery PDF link annotation
    • http://rte-ita.fun/rorexaboberuberogu3qp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497650/normal_602d97a6077a3.pdfIn PDF document text
    • http://vnds-v.website/44629133214h7l5.pdfIn PDF document text
    • http://grantmedica.ru/how_to_write_a_non_fiction_book_synopsissmg5i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384037/normal_5ffae1a191273.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/ibYhege/58882763680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454167/normal_5fe070cb3b3f2.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/xid41id/galaxy_s9_live_wallpaper_port.pdfIn PDF document text
    • https://cdn.sqhk.co/bodorosuzuta/j7mCp4F/67030248142.pdfIn PDF document text
    • http://liketime.online/lutogawufubutesesuvifgdppi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_602ae8f9f2240.pdfIn PDF document text
    • http://macsk.space/bilevisuponomizujiq2h4p.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/g7Ghhgd/47661199749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393016/normal_6018dad7a7732.pdfIn PDF document text
    • https://cdn.sqhk.co/goxupolofodi/wy5jihf/how_high_are_u_test.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/android_graphics_pipeline.pdfIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_58ba8adaa2a94232b7caacf49e45c543.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pegozegi/55363557844.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/gixar.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/utorrent_telugu_movies_free_2019.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_0dfcdd80d53244779cc9fd9b83b9965b.pdf?index=trueIn PDF document text
    • https://09d56968-2ae9-412d-ad86-e67dc63a1c23.filesusr.com/ugd/e8b91f_fb6bec5f41b845c5b5d4f740672fbad8.pdf?index=trueIn 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_off0000eb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB53 5308 bytes
SHA-256: 415d1b7c3b0e5a0601a65dd9c864cda501b1132814d90d9ab996a693b7f4a0a4
font_01_sfnt_off0000fd71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD71 10868 bytes
SHA-256: 6cd38834b491ba01e72b0f96da024cc580c9a3f19423180f0f31e2ae0ab4667d

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