Malicious PDF — malware analysis report

Static analysis result for SHA-256 a44bf2b8d91a1193…

MALICIOUS

PDF

163.6 KB Created: 2021-03-24 18:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7e12caeb455021bf5a12607992615690 SHA-1: dbad790cae65191aa108160c67069385e595bcf6 SHA-256: a44bf2b8d91a1193db4c041fee5f2982e5acc15fbccf92b1c16d6c52e465319c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and configured as a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/wix?keyword=persona+3+strength+door PDF link annotation
    • http://checkmyscore.info/sex_offender_registry_md_tiersrqoc4.pdfIn PDF document text
    • http://garantiya62.ru/53971720931slqv2.pdfIn PDF document text
    • https://lonokowikur.weebly.com/uploads/1/3/5/3/135384913/97cb73f.pdfIn PDF document text
    • https://donimafu.weebly.com/uploads/1/3/5/3/135395233/6423683edb.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/ciiQgcH/yellow_apples_calories.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/idBRAie/5548504003.pdfIn PDF document text
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/4444249.pdfIn PDF document text
    • http://chaptejvxz.fun/does_friedrich_nietzsche_believe_in_godukcav.pdfIn PDF document text
    • https://gikuxowatevu.weebly.com/uploads/1/3/2/6/132681634/luzepegij.pdfIn PDF document text
    • http://poopo.ru/bink2w64._dll_missing_gta_5si0ie.pdfIn PDF document text
    • https://motixovelubebov.weebly.com/uploads/1/3/6/0/136085904/8791277.pdfIn PDF document text
    • http://palitra-cveta.ru/simplehuman_soap_dispenser_troubleshootingd7e7q.pdfIn PDF document text
    • https://zavodazokexa.weebly.com/uploads/1/3/4/6/134632977/7436195.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/Ljhdgii/check_kplc_bill_using_sms.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_837146c8c98247dc81a05a1c23b981a3.pdf?index=trueIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_cbfbfec4d8be44c58ce26c42de652761.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/mawafatinuvepuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/muxuperazuvowa.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/78223029496.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_off0001e4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E4CA 31592 bytes
SHA-256: 7e7be4f7dff8424227b626fd9144c8379aaa55ee69c833c03ec739f4a998f3cc
font_01_sfnt_off000246e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x246E6 5220 bytes
SHA-256: 026e0c11654e8f5b11e3fb8334c9e811927be66417865b7b6703664905d81d13
font_02_sfnt_off0002589a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2589A 11948 bytes
SHA-256: 1a9037294c641fa83a79cde98224988f5f0d97cb7597e2c0809f11326c20a10e

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