Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5eca337ff8899fb…

MALICIOUS

PDF

77.0 KB Created: 2021-04-07 18:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2471b9792f704357b9f93590533bef2c SHA-1: 5332b2f776612678b4f3665a5bc5d5e93ac5d576 SHA-256: e5eca337ff8899fb2231f897905ab6a2aa0850eac40e059b8e59a5f5100ec8e2
186 Risk Score

Malware Insights

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

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 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/strik?utm_term=batman+the+long+halloween+animated+movie+release+date PDF link annotation
    • https://cdn.sqhk.co/vimerokil/Qhehdhj/negig.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/wMFieje/59564920105.pdfIn PDF document text
    • http://hesap-al-sat.com/posafemimvv0s3.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/eigjfTD/sivaz.pdfIn PDF document text
    • http://liolika-rsya.ru/candy_crush_friends_saga_level_217azypi.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/spjfzgi/best_horror_movies_2020_released.pdfIn PDF document text
    • https://cdn.sqhk.co/fofotixoz/DCgg4gc/62886460702.pdfIn PDF document text
    • http://razvivatel.blog/375313725560gz8j.pdfIn PDF document text
    • http://springtea.space/wing_chun_training_programqpfe7.pdfIn PDF document text
    • https://cdn.sqhk.co/kovajivika/hjdheji/chain_reaction_machine_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/novitovikor/Mhcjaz7/hd_screen_recorder_video_recorder_app.pdfIn PDF document text
    • http://giveaway2020.info/vamedobimalesekenodosojib5j.pdfIn PDF document text
    • https://cdn.sqhk.co/kowumutajaw/ficjjih/tv_series_pub_quiz_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/lukejisuvawe/2Wituji/35733776390.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/uhfEifw/dibud.pdfIn PDF document text
    • https://cdn.sqhk.co/sukonazukuv/doUy5VX/train_sim_world_2_deluxe_edition_ps4.pdfIn PDF document text
    • http://clientbluebadge.com/nolotegapm25f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_8b15484405e04711bac94da0baba88ec.pdf?index=trueIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_7202c781abf24d828d94a7a57788a7a0.pdf?index=trueIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_13766eb90d1c4bee896eafd3172d4c33.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_off0000ee62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE62 5440 bytes
SHA-256: 85a491cd802c8e3f72bd8276cd274f2d42de3b436b873f5bc979601fb0a5a9fb
font_01_sfnt_off000100cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CF 10996 bytes
SHA-256: d660255c1847cb6f1d5d6a6eb15c8f0ae9ef7555314adaecef193de055a7b7bb

Open this report in the interactive analyzer, or submit your own file for analysis.