Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a61807da4b46d3…

MALICIOUS

PDF

84.1 KB Created: 2021-02-20 11:37:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a43e52a4f41377bc3196bcd306265e48 SHA-1: 1989cf832db5b45620253b7e5ae6e0e52a33a723 SHA-256: 56a61807da4b46d3e6dded4fd57b3f86e7f5c1052bb366aa6d2c6f541305410f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a significant portion pointing to disposable hosting and potentially malicious domains. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of creating link farms on such domains, often used to host phishing pages or distribute malware. The ML classifier and ClamAV detection strongly suggest malicious intent.

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/wix?keyword=persona+4+hierophant+social+link PDF link annotation
    • https://wadapunefivuda.weebly.com/uploads/1/3/4/3/134307948/1823516.pdfIn PDF document text
    • http://zuwazari.22web.org/chordal_harmony_janek_gwizdala.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/897227583013bak.pdfIn PDF document text
    • http://50offshop.pro/spectrobes_beyond_the_portals_cardsx72ud.pdfIn PDF document text
    • http://bluebadge-support.com/83101377574denwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_60266c0c1e938.pdfIn PDF document text
    • https://wewowalowumuv.weebly.com/uploads/1/3/4/0/134040384/7786940.pdfIn PDF document text
    • https://mezovojexojija.weebly.com/uploads/1/3/0/8/130874002/5435491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479210/normal_6021bf2984343.pdfIn PDF document text
    • http://mufawajidoxe.22web.org/mutisolizeretipowozom.pdfIn PDF document text
    • http://losiruwu.66ghz.com/awful_to_contemplate.pdfIn PDF document text
    • http://kersita.space/rememitopo442rc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mejufupivu.epizy.com/kaththi_video_songs_hd_1080p.pdfIn PDF document text
    • http://linexiziretewoj.rf.gd/hard_riddles_but_easy_answers.pdfIn PDF document text
    • http://funasuruwet.epizy.com/bixoviritowexon.pdfIn PDF document text
    • http://ramivigemotaf.epizy.com/chalkboard_wedding_sign_template.pdfIn PDF document text
    • http://baxovebiw.rf.gd/mugen_games_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE893 4324 bytes
SHA-256: cbe4bb4ac9f1688b7695e1f3d00d08b57de5729aee1b990fe4121bb9b167c737
font_01_sfnt_off0000f7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D1 5172 bytes
SHA-256: 08361f7ed3ef69f3e5bd6f33e4eb607a11eb5cabdd3bc4b9ac04b12c5fca47be
font_02_sfnt_off0001096d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096D 10332 bytes
SHA-256: 4d32ef060c5ad385ac53746e5dece6567016fae374b5f5e1d9242f707ce0598d
font_03_sfnt_off00012cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD5 16240 bytes
SHA-256: 840aca7af89d6665d446bd68a022ef871a8c4a07170005e3094ac854b8115bb7

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