Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd578e0180bcba19…

MALICIOUS

PDF

78.0 KB Created: 2021-06-04 22:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1dedfc40d4e41466cccb7ee5cfcab504 SHA-1: 379116f73a86d0b6f9a998ebbe3b9ac1acb9227c SHA-256: fd578e0180bcba194af5a6abfcf7d542e50ff1f08c8ce64c3b8964524693e3db
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links, likely to redirect users to malicious sites. No scripts were extracted, but the overall structure and heuristic firings strongly suggest a malicious intent to redirect users.

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://wastran.ru/pbw?utm_term=can+you+clone+an+android+box PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470832/normal_602128a5c7447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408336/normal_600fee841102c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451736/normal_5fcb8f72ee0e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491665/normal_5fcaad0baac12.pdfIn PDF document text
    • https://mefifusefom.weebly.com/uploads/1/3/4/2/134266023/wadorozabunef.pdfIn PDF document text
    • https://nozojotama.weebly.com/uploads/1/3/4/5/134585139/4622233.pdfIn PDF document text
    • https://kumaneke.weebly.com/uploads/1/3/4/6/134682587/xupuno_bezavesuwa.pdfIn PDF document text
    • https://gedikitol.weebly.com/uploads/1/3/4/9/134901051/fativi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466680/normal_605d998b3b5b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401714/normal_5fe387ab690cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465388/normal_5fee7e8adb1c1.pdfIn PDF document text
    • https://lapefobok.weebly.com/uploads/1/3/4/6/134663543/rogikezotelid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499319/normal_6052441bd7b14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gamaxidad.pbworks.com/w/file/fetch/144536757/wixuk.pdfIn PDF document text
    • http://zufogopojut.pbworks.com/f/jakiputifoxiwubadusepug.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/w/file/fetch/144480000/carrom_pool_mod_apk_new_version_3.0.1_apk.pdfIn PDF document text
    • http://kirozatijawu.pbworks.com/w/file/fetch/144514827/how_to_unlock_all_characters_in_smash_bros_crusade.pdfIn PDF document text
    • http://rasovuxosew.pbworks.com/w/file/fetch/144564150/linear_algebra_with_applications_9th_edition_textbook_solutions.pdfIn PDF document text
    • http://tarogifere.pbworks.com/w/file/fetch/144489918/53684063371.pdfIn PDF document text
    • http://nagomax.pbworks.com/w/file/fetch/144612705/is_yamaha_launching_rx100_again_in_india.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/f/sezejejazesuxenusuwulax.pdfIn PDF document text
    • http://podixarutib.pbworks.com/w/file/fetch/144473658/download_cheat_my_talking_tom_friends_mod_apk.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_off0000f5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B6 4968 bytes
SHA-256: 4d046b0533722e86aae0a397681cf1207d040b83d477fb45eedac103e9ed5b0c
font_01_sfnt_off000106b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B0 10584 bytes
SHA-256: 77f0c20b07c1262b66067edc429d5e0b45a97573824bb11cb7f5f9ed9f3c683d

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