Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d7fd9dd9d4ce3e…

MALICIOUS

PDF

81.9 KB Created: 2021-04-03 07:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3cc84e672a921f8b005dd956b3a49fc4 SHA-1: 40f6b3ee0df3bbd90f32d64f2b12e8bb0af6d995 SHA-256: d1d7fd9dd9d4ce3ec329861703d1062074aeae57809adc9c093c566453989257
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, with one prominent URL pointing to 'jottigo.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host multiple links on disposable domains, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=kenda+bear+claw+evo+vs+itp+mud+lite PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379374/normal_603041368196a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496015/normal_6016a9db95d18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447252/normal_6041d50d93ef4.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/ajbjghb/geometry_dash_world_pc_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/jafiwimeg/jagdjeW/23284500908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_60491de0d400b.pdfIn PDF document text
    • https://cdn.sqhk.co/dagosasojo/jb5bmib/tv_hill_climb_game_download_apk.pdfIn PDF document text
    • http://tranquils.space/pedagogy_mcq_bookzhkil.pdfIn PDF document text
    • http://noverst.xyz/apple_pie_apk_meaningsk947.pdfIn PDF document text
    • https://cdn.sqhk.co/zojafatowulu/Eajaihe/ind_as_34_interim_financial_reporting.pdfIn PDF document text
    • https://cdn.sqhk.co/kixowijeka/MdhceQi/63843028434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_6031903802550.pdfIn PDF document text
    • http://rujisuki.mygamesonline.org/apc_back-ups_xs_1300_lcd_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/43094121818.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/11727926306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eea28d6-ad61-4b5e-a1c0-73c237581681/5_things_in_a_healthy_relationship.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/car_engine_parts_drawings_with_dimensions.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/89093342839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb2c951d-45dc-40b3-9bd3-33413d2c6119/tapajezimosizuwemesek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce189a3e-672f-400c-8ae8-6cf79146892f/kopebirutejopabuxos.pdfIn PDF document text
    • http://padusij.onlinewebshop.net/piworilobiji.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/12._the_cognitive_perspective_of_psychology_focuses_on.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_off0000fff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF0 5480 bytes
SHA-256: 061046f9f982edda10585c7bf03c4b9db55db91c59a67d8049a167c8b6386230
font_01_sfnt_off00011299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11299 11572 bytes
SHA-256: f756c49a6ce87aaf47807f12d85b1293e0f04657b9e2d04603061168db25b225

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