Malicious PDF — malware analysis report

Static analysis result for SHA-256 9739678dc9e32792…

MALICIOUS

PDF

89.4 KB Created: 2021-03-15 05:27:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 326996eba25850268ac206be8ab3415b SHA-1: aa71dc6e06950eebaad460166916c2504ce294bd SHA-256: 9739678dc9e32792ca57271155382158a0d017b76d06cbf6a98da89848817926
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 0.9990

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://pelibifir.ru/wix?keyword=crack+adobe+animate+cc+2015 PDF link annotation
    • http://newberginvestmentproperty.com/la_vie_en_rose_lyrics_pronunciation_guidevfug9.pdfIn PDF document text
    • http://fumizudo.sportsontheweb.net/stcw_2020_manila_amendments_free_download.pdfIn PDF document text
    • https://gakefutafo.weebly.com/uploads/1/3/0/7/130739004/481ed.pdfIn PDF document text
    • http://gixitetopes.scienceontheweb.net/kingdom_animalia_classification_chart.pdfIn PDF document text
    • http://vetozadep.mywebcommunity.org/crowfeathers_trial_online.pdfIn PDF document text
    • https://kuxalureb.weebly.com/uploads/1/3/1/3/131383592/tinor_majoxu_gobijusoribod_xewet.pdfIn PDF document text
    • http://trickyturkey.com/16175650489uowdu.pdfIn PDF document text
    • http://loveworld.club/palonu55h3u.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/brother_ls-2125i_sewing_machine_manual.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/15797386564.pdfIn PDF document text
    • http://busurman.space/alcatel_pixi_3_one_touch_manual0f7j1.pdfIn PDF document text
    • http://pokinusuvato.getenjoyment.net/alimentacion_para_diabeticos_e_hipertensos.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/the_visual_display_of_quantitative_information_goodreads.pdfIn PDF document text
    • http://xplaintome.ru/72614215368b2kl5.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
    • https://s3.amazonaws.com/kelukakeb/67982744925.pdfIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_14121aa68f4348c7a8cb4e6ea0a9b5f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/benuka/verizon_mi424wr_password_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/85598370557.pdfIn PDF document text
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_3f0316b3ef994d1f942e624ee336e408.pdf?index=trueIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_11edcc67382b42b18232000e8c1cf889.pdf?index=trueIn PDF document text
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_84117197c62e40e2a289c0fc9c847da4.pdf?index=trueIn PDF document text
    • http://liwetagosozel.onlinewebshop.net/87048649144.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_off0000f9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CA 5340 bytes
SHA-256: f49bb352336109a873c5cf4d15d814898a9387eeb73fcb4360a42112dcfdc1a8
font_01_sfnt_off00010be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE1 12436 bytes
SHA-256: a203ce392db395edcfb3f2a52fd31634490d68de9799b203acfd60b9ca044d54
font_02_sfnt_off00013416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13416 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
font_03_sfnt_off00014946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14946 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34