Malicious PDF — malware analysis report

Static analysis result for SHA-256 d79775a5d6964591…

MALICIOUS

PDF

81.6 KB Created: 2021-05-03 09:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 37a1f1cb4194192dfb0a8c3e53226882 SHA-1: daf4e4febd609817b5631c595d6ede6f564133b8 SHA-256: d79775a5d6964591e2f8ce654e122fd8a33ee7dd16a96e185f18e61736ef41d8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dugedepap.ru/strik?utm_term=can+you+take+permit+test+online+california PDF link annotation
    • http://zapitexidij.mypressonline.com/affluenza_book.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/CbT1ghp/everfi_module_5_credit_scores_answers.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/jezazovedoxulaxumum.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/gudeke.pdfIn PDF document text
    • http://rolorutebu.sportsontheweb.net/166865437.pdfIn PDF document text
    • https://cdn.sqhk.co/pategazikiw/aR1ihn4/steps_to_draw_anime_eyes.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/8212137658.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxofalu/j7geRna/private_internet_access_vpn_ipad.pdfIn PDF document text
    • https://xadidevoki.weebly.com/uploads/1/3/0/8/130873902/13d29.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/ZIGSjaa/54979003952.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/dopit.pdfIn PDF document text
    • http://postel-na-zakaz.ru/jang_e_siffin_in_urduycri3.pdfIn PDF document text
    • http://siwarezowagi.iblogger.org/zapawipixatuzaboxikitakak.pdfIn PDF document text
    • http://fasufigige.iblogger.org/wanted_poster_template_ks2_editable.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/free_iphone_vocabulary_builder_apps.pdfIn PDF document text
    • http://wowevopopof.22web.org/rimijanuripudumof.pdfIn PDF document text
    • https://cdn.sqhk.co/vomifavafo/7gjidxt/68941091869.pdfIn PDF document text
    • http://good-production20.site/how_to_reset_att_u_verse_routereyu0t.pdfIn PDF document text
    • http://store50off.info/astute_graphics_crackm5ujw.pdfIn PDF document text
    • http://tiktokfrance.fun/jekusokopurirokol927or.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pazokidewuwi.rf.gd/your_uninstaller_portable_free.pdfIn PDF document text
    • http://jadivepijuga.myartsonline.com/anarchist_s_tool_chest.pdfIn PDF document text
    • http://dizepeliw.epizy.com/80851586791.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24F 5232 bytes
SHA-256: 9c8b90e59403fd212d3a9c31ecf3080dc878bd5634624a53e36175ebef709dda
font_01_sfnt_off0001041a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041A 11272 bytes
SHA-256: 85f9a1eca456e862e36b82bff94515a246c6696711afc90358f9c6e8c0b27fa0
font_02_sfnt_off00012a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A98 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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