Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde7f2c1644523a4…

MALICIOUS

PDF

77.1 KB Created: 2021-03-04 15:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ae217763142e99bb6337b31237b86751 SHA-1: 9df4de68616caed1d55bef228436dac41e35da3f SHA-256: bde7f2c1644523a44d34825833587e543410ccf23d20ac479ea070f201c717f4
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'public relations' and the authoring application 'wkhtmltopdf', suggesting a lure. The presence of many links to disposable domains and potentially malicious URLs indicates an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/strik?utm_term=how+will+you+define+public+relations PDF link annotation
    • http://vuwiwetidajin.mywebcommunity.org/ditor.pdfIn PDF document text
    • https://gulipuzajetag.weebly.com/uploads/1/3/5/3/135397689/mupasuli.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/en_nombre_de_la_rosa_pelicula_completa_gratis.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/samsung_washer_repair_service_near_me.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/73484041399.pdfIn PDF document text
    • http://zhk-rekord.info/18167937673toolp.pdfIn PDF document text
    • http://piwofoterif.sportsontheweb.net/gezolivokefaririlejom.pdfIn PDF document text
    • http://asia.kiwi/cinquenta_tons_de_cinza_legendado_onw5gj9.pdfIn PDF document text
    • https://tewonubipudi.weebly.com/uploads/1/3/6/0/136016370/tusizinesasit-perurupos-zoteji.pdfIn PDF document text
    • http://hotel-engels.ru/changing_your_voicemail_password_iphone112gx.pdfIn PDF document text
    • http://ca-manalapan.space/chopin_complete_workswolm2.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/40666330617.pdfIn PDF document text
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/rutowexuzorizapezowo.pdfIn PDF document text
    • https://wuwebiwurumebil.weebly.com/uploads/1/3/1/1/131164488/7794b59213f90.pdfIn PDF document text
    • http://roxedizusugu.mywebcommunity.org/85783794538.pdfIn PDF document text
    • http://varietystore.website/how_to_hook_up_my_directv_to_wifi2g3o1.pdfIn PDF document text
    • http://card2card.live/pojezunebajulicpb6z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rigidafavubo.myartsonline.com/nawegu.pdfIn PDF document text
    • http://nujugeteteda.myartsonline.com/mass_effect_2_crack_freedoms_progress.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52cd6b0f-5726-447c-9a3f-0f8f78cc9f9d/tri_state_bus_midway_to_highland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/963f8d3b-d8f7-43ae-bd5a-5f7d79dfed2d/folegumikawemis.pdfIn PDF document text
    • http://rofuvawitarul.atwebpages.com/nesolebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/231210a3-3a84-4937-b1f4-1bb368cd4e75/wu_tang_clan_american_saga_episodes_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b37aa996-6d19-4b30-a6e7-54dda9676ec0/88133704800.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_off0000ef7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7F 5444 bytes
SHA-256: e49d0ccadc61f4975221b2b69a3df581a28e4e2751ebf161172da563de98886e
font_01_sfnt_off0001021e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021E 11040 bytes
SHA-256: 2c3f90e100728c926449c3e8f04cd9282de56890f63efd42419dcfdd219f79fb

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