Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f60b6bf101b6e0c…

MALICIOUS

PDF

75.6 KB Created: 2021-06-10 01:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17473f14a9575583342393afe9c29e59 SHA-1: dfd709332c6f9fbe068ab086440f7dd1a2373c13 SHA-256: 0f60b6bf101b6e0c05901307c0f120b0dd6d3d09e775474af467f815a077901b
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan', and an ML classifier indicating maliciousness. It contains numerous external URIs, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://huntic.ru/pbw?utm_term=download+file+obb+ff
    • https://rejileju.weebly.com/uploads/1/3/4/3/134335231/vesanozu_fokatawen_lubekexija_solavuxovuke.pdf
    • https://static.s123-cdn-static.com/uploads/4471092/normal_6006e26b1899f.pdf
    • https://padexalexip.weebly.com/uploads/1/3/4/2/134234572/678f5b0b57fd253.pdf
    • https://cdn-cms.f-static.net/uploads/4444648/normal_6049322881c6b.pdf
    • https://dalulasu.weebly.com/uploads/1/3/4/4/134493325/701fc1a.pdf
    • https://zitakafe.weebly.com/uploads/1/3/4/5/134587302/b6a6ff1.pdf
    • https://lagubezawepafu.weebly.com/uploads/1/3/1/8/131856446/dixubaduwikute.pdf
    • https://cdn-cms.f-static.net/uploads/4491437/normal_603852fa291c5.pdf
    • https://cdn-cms.f-static.net/uploads/4450248/normal_601db5e57276e.pdf
    • https://static.s123-cdn-static.com/uploads/4489852/normal_5ff8c93b51aff.pdf
    • https://detubutil.weebly.com/uploads/1/3/5/3/135348338/rixozonilobepil_siwebasafate_xumukukalavunun.pdf
    • https://sufafiderek.weebly.com/uploads/1/3/0/8/130814754/7556548.pdf
    • https://cdn-cms.f-static.net/uploads/4490534/normal_60102b16af134.pdf
    • https://static.s123-cdn-static.com/uploads/4499995/normal_5ffd0e84da657.pdf
    • https://jopixedojowagi.weebly.com/uploads/1/3/4/8/134852439/1ef6fa0ff9ee.pdf
    • https://cdn-cms.f-static.net/uploads/4416791/normal_5fd11a77eb2b6.pdf
    • https://cdn-cms.f-static.net/uploads/4368469/normal_60313130105bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tavaretaz.pbworks.com/f/98085220460.pdf
    • http://mifimoruzuwo.pbworks.com/f/how_to_attract_money_dr_joseph_murphy.pdf
    • http://dokajawema.pbworks.com/f/daisy_jones_and_the_six_book_club_questions.pdf
    • http://gebetedoke.pbworks.com/w/file/fetch/144870663/el_gran_grimorio_o_dragon_rojo.pdf.pdf
    • http://funesut.pbworks.com/f/20619392100.pdf
    • http://xidesux.pbworks.com/f/54764614584.pdf
    • http://mupalunava.pbworks.com/w/file/fetch/144610308/download_corel_draw_x7_portable_windows_10_32_bit.pdf
    • http://zuwofig.pbworks.com/w/file/fetch/144679644/pukise.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec10.bin
ff3551e557675adca97412975317f864f735afe71de92cdeccf46e72daa3f94f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC10 4860 bytes
font_01_sfnt_off0000fcc8.bin
df6be6396028eda79020c7fefeb30ddaac9a594a33137a024c690eae8de84a0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC8 10452 bytes

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