Malicious PDF — malware analysis report

Static analysis result for SHA-256 bece742ae408ee04…

MALICIOUS

PDF

86.3 KB Created: 2021-03-26 07:27:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9f621011d5e013035dd9298d570f99b8 SHA-1: c2dffea143aeeb1e0c6fac835ac360b8332bee8c SHA-256: bece742ae408ee046720836d1b6f2d45a7c4a5635dcd3082755a873aa25240f0
186 Risk Score

Malware Insights

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

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 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/123?utm_term=binomische+formel+%25C3%25BCbersicht PDF link annotation
    • http://zunololanuxigu.sportsontheweb.net/classroom_management_notes.pdfIn PDF document text
    • https://pejupatuwotim.weebly.com/uploads/1/3/2/8/132814375/dulekowarogobuto.pdfIn PDF document text
    • https://cdn.sqhk.co/zawileveruz/idgg6hf/avengers_first_part_movie_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/jZ3htji/modern_warfare_dlc_not_working.pdfIn PDF document text
    • http://jotupati.22web.org/39001617783.pdfIn PDF document text
    • https://cdn.sqhk.co/pesasotiro/jjaIGha/nuvalatix.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/ggDOhg8/hole._io_online_mobile.pdfIn PDF document text
    • http://timedezalug.iblogger.org/julijidukopixanuv.pdfIn PDF document text
    • https://moforikegumiret.weebly.com/uploads/1/3/2/6/132680993/1616054.pdfIn PDF document text
    • http://pobadabodoz.scienceontheweb.net/16716744342.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/ja7ihhd/dancing_line_2021.pdfIn PDF document text
    • https://cdn.sqhk.co/xanapaje/icvxjcP/color_splash_photo_editing.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/ije4oR4/84462841463.pdfIn PDF document text
    • https://cdn.sqhk.co/lediname/WihePb1/44493351073.pdfIn PDF document text
    • https://cdn.sqhk.co/woxutonezem/jfveggf/kutuzuzuvurumogesamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vojapu/why_do_we_have_text_features.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/evidence_of_evolution_worksheet_answers_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/bar_interior_design.pdfIn PDF document text
    • http://wirirarosutuki.epizy.com/tibofebolutonijekazi.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/lenisupex.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/nonufavepibatolugivuvub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC63 5220 bytes
SHA-256: 52776c71bdbd900232a554fd21d57d69886c8196d95e3f98c4d81b402cc83cca
font_01_sfnt_off00010dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD0 11712 bytes
SHA-256: 0cc73be74ed3a446a29b760ca3d363a8a9c80fbe960c43bb4ff002f9089ea1d1
font_02_sfnt_off0001349c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349C 16060 bytes
SHA-256: ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833

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