Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4e13f5bfe2e5ec…

MALICIOUS

PDF

78.0 KB Created: 2021-03-18 08:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 844eeb20bff3553ec0caa44f27268f1f SHA-1: 6efe5c4e4de281b0269706d33e0fa1321240add3 SHA-256: be4e13f5bfe2e5ec3bf710fa4e3417279c91c9bafe1b4e4f99ccc11d1b127047
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 hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/123?utm_term=detroit+become+human+marcus+theme+piano+sheet PDF link annotation
    • https://cdn.sqhk.co/gagobuniponi/eTAngjH/video_player_android_auto.pdfIn PDF document text
    • http://tuzirawejaw.mypressonline.com/how_much_does_the_proform_hybrid_trainer_weight.pdfIn PDF document text
    • http://tafuvomilo.22web.org/savisis.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/ritefomijorumujopa.pdfIn PDF document text
    • http://wisadovebedej.iblogger.org/the_magicians_season_5_episode_12_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/hipvHbe/chinese_checkers_2_players_same_computer.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/biiiaRA/shareit_app_for_pc_windows_10_64_bit.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/jbgihcu/plants_vs_zombiestm_2_free_apk_download.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/how_to_share_a_memory_on_facebook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rabelinowizufe.myartsonline.com/do_dryer_have_a_reset_button.pdfIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_55cee25f9238454283e881c2a9e25811.pdf?index=trueIn PDF document text
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_5337cfd8c3884302863dac149e21ed41.pdf?index=trueIn PDF document text
    • http://jadupapobixe.epizy.com/96079679151.pdfIn PDF document text
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_d993612682d242ae829bed1b1dd81407.pdf?index=trueIn PDF document text
    • http://vugugemo.atwebpages.com/vibivekafufavavekirer.pdfIn PDF document text
    • http://kumobeba.epizy.com/logokudalazununute.pdfIn PDF document text
    • https://945c5b1a-9feb-4a08-b72d-c905ca1b1520.filesusr.com/ugd/27135d_1f5b9f951a9b4037a2dba2ca9510754a.pdf?index=trueIn PDF document text
    • http://polilofu.onlinewebshop.net/1999_buick_century_repair_manual.pdfIn PDF document text
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_5c51e91a0371485f9af39ed77d9c86e5.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D7 5280 bytes
SHA-256: f7dc2426083a7b71a66a66e3d8acab40f5abce4b72bb84893d57440405b098d6
font_01_sfnt_off000105a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A2 10940 bytes
SHA-256: 95fe232348b1e8cc2c6afc91447e86c5c6cc480896b1d37b0c373fa58dc3e4fe

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