Malicious PDF — malware analysis report

Static analysis result for SHA-256 082fbe889f494ec4…

MALICIOUS

PDF

78.9 KB Created: 2021-04-02 13:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: cb28c7e0e9534bf82559f83891ca1771 SHA-1: de4595b20c33d162ce2d726358b835813ffcbd85 SHA-256: 082fbe889f494ec41d8bfd9f0d1434d57254284a9261bd7cd099c1a22e54e7d0
126 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier flagged it with high confidence. The PDF contains numerous embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of external URIs and link farm heuristics indicates a malicious intent to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/award?keyword=il+fascismo+eterno+pdf PDF link annotation
    • http://swiss-gear-top.xyz/official_taekwondo_training_manualztejd.pdfIn PDF document text
    • http://wuwisometojone.66ghz.com/sheet_metal_thickness_gauges.pdfIn PDF document text
    • http://helpforteam.com/black_and_decker_500_amp_jump_starter_wont_charge22qii.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://cdn.sqhk.co/tikisudolo/ghhhzjf/android_arduino_control_esp8266_wifi_control_relay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447460/normal_5fe00ac6c4cb0.pdfIn PDF document text
    • http://ipatovaalena.ru/effective_teaching_methods_gary_d_borich_free_download8xbdv.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/how_to_earn_online_by_solving_maths_problemsxzjcz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368481/normal_5fc94fd91e68c.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/fjgcoQH/51024872765.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/masitudu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392199/normal_5fdfdc8c617ac.pdfIn PDF document text
    • http://magnitoli-2ekran.site/how_to_make_excel_formulas_run_fasteryksik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490250/normal_5ff32a4b5d8df.pdfIn PDF document text
    • http://terugate.mypressonline.com/49185318619.pdfIn PDF document text
    • http://remont-pc.website/the_art_of_leadership_bookpemba.pdfIn PDF document text
    • http://prizyivnik.ru/44408567252aa5mg.pdfIn PDF document text
    • http://pemotutafid.mywebcommunity.org/4_temperamentos_del_ser_humano_test.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/igcqxji/galaxy_strike_online_game.pdfIn PDF document text
    • http://kizunawinim.getenjoyment.net/insurance_and_behavioral_economics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_5fd1892db0b76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiwobera.rf.gd/generator_vs_alternator.pdfIn PDF document text
    • http://rugeritubaduw.epizy.com/ansys_classic_tutorial.pdfIn PDF document text
    • http://fusugesagovovez.rf.gd/esv_bible_verses_on_forgiveness.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F4 5236 bytes
SHA-256: 49f6ad3fde4336d2f461d65bb1d68f9c553cbb80ec660695cfc8fc61e72568b3
font_01_sfnt_off000106ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AB 11712 bytes
SHA-256: 8d6eca6f194bd0e2e1651f1c2f59258c9b493b8a161c49394b93683d43a5bbac

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