Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3dcffc9eb7fc0fd…

MALICIOUS

PDF

77.7 KB Created: 2021-06-07 23:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e76b358d506506b1c3d24fd3a49bb9bd SHA-1: c8628a64027b366371051e757b38a31de76421bc SHA-256: e3dcffc9eb7fc0fd2eb1ba0c7fa0e9b74843ed6c5249c9833177a80f4c52a95d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'allytemp.ru' which is associated with a movie download lure. The PDF structure and embedded content suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

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://allytemp.ru/pbw?utm_term=narnia+full+movie+in+tamil+download+tamilrockers
    • https://kinezamoz.weebly.com/uploads/1/3/4/7/134745204/wisupanelux.pdf
    • https://sesirolomozanu.weebly.com/uploads/1/3/2/7/132741009/2fc7bedad3.pdf
    • https://cdn-cms.f-static.net/uploads/4427274/normal_6046f517df862.pdf
    • https://static.s123-cdn-static.com/uploads/4385613/normal_5fc84fc33b374.pdf
    • https://pejifote.weebly.com/uploads/1/3/5/3/135348690/felefoxunenaseko.pdf
    • https://gafajabi.weebly.com/uploads/1/3/4/8/134880466/xelovipuj-pugaduvolejazij-turapemu.pdf
    • https://cdn-cms.f-static.net/uploads/4393197/normal_6069f2c4badb2.pdf
    • https://static.s123-cdn-static.com/uploads/4447096/normal_5fe28b8037066.pdf
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/lalavakedijasaja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fcc09b61-cbeb-4d95-9675-157d1f130a88/nuzon.pdf
    • http://nikekuva.pbworks.com/f/dell_latitude_5590_i5_specs.pdf
    • http://mefijunov.pbworks.com/w/file/fetch/144424704/how_to_select_electrical_cable_size.pdf
    • http://gosirata.pbworks.com/f/27009015058.pdf
    • http://dawijunegolo.pbworks.com/w/file/fetch/144422619/reset_ink_level_epson_l110_software.pdf
    • http://wezenibafasi.pbworks.com/f/65274574704.pdf
    • https://uploads.strikinglycdn.com/files/9621ae2e-8c00-4a7f-98d9-cef3f42f0277/baguwonixivux.pdf
    • http://duziruromeja.pbworks.com/f/factoring_trinomials_worksheet_with_answers_algebra_2.pdf
    • https://uploads.strikinglycdn.com/files/874a1eda-f331-4c17-9358-104d4c1910c7/is_the_dyson_airwrap_worth_it_reddit.pdf
    • http://rujuboxu.pbworks.com/f/46728845673.pdf
    • https://uploads.strikinglycdn.com/files/6577b04d-9610-47c5-a4ed-67659812b046/sulukedofijatemabevod.pdf
    • http://giwupiraride.pbworks.com/w/file/fetch/144771558/fast_and_furious_7_download_in_hindi_hd_1080p.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_off0000f224.bin
444d98859245433a0868212214929fba189e4e48edbccc53bcf34db44744af5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF224 5352 bytes
font_01_sfnt_off00010465.bin
4237b9c8160c0f1b43b5615f6316b0191e02716a5b28ebf195517fc4e6216e88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10465 10732 bytes

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