Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6733db4b6fa1f6…

MALICIOUS

PDF

106.5 KB Created: 2021-03-23 03:28:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 856388e669b589a73db601a93d3e47f3 SHA-1: b34e5ddc466da2fef06021a1356a402c4e1f2414 SHA-256: 2d6733db4b6fa1f68e9854a391d4a98b1f353c5d63cd9aee46c524ca4fe481dd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and one specific URL (https://baarspo.ru/strik?utm_term=how+to+train+your+dragon+series+2020) is flagged as external. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=how+to+train+your+dragon+series+2020 PDF link annotation
    • https://cdn.sqhk.co/posebozej/bKeiKja/how_to_draw_cartoon_animals.pdfIn PDF document text
    • http://murerejomijuv.22web.org/verathon_bladder_scanner_service_manual.pdfIn PDF document text
    • http://puveduxorapuba.iblogger.org/math_minutes_5th_grade_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/kimazibo/ftOShbJ/punching_ball_caiyungg_anti-_stress_desktop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc91464f-25ea-4833-8efc-d98f6ea3923e/34302896241.pdfIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_9f26bac189664a3099632718f2aa5f05.pdf?index=trueIn PDF document text
    • http://munoxefarofow.rf.gd/business_letter_format_samples.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/jamejuxudu.pdfIn PDF document text
    • https://acbe2b0b-ee64-4eea-b0ce-372b1aa9cc7a.filesusr.com/ugd/4bcc67_8f4686ceea524d80902dec2386ed8d4d.pdf?index=trueIn PDF document text
    • http://noratev.myartsonline.com/que_es_la_silaba_atona_y_10_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/povinurudagu.pdfIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_ec13307451fe4bccb2aaddc782069b90.pdf?index=trueIn PDF document text
    • http://mazolofoju.epizy.com/c_programs_on_strings.pdfIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_fb7c514d443a439e9d819a94257f4013.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fibesezati/puvubuletiv.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/ashish_arora_physics_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228f9e20-2c37-4635-98e7-9d14542941a7/venn_diagram_questions_in_hindi_download.pdfIn PDF document text
    • http://dosidojabar.epizy.com/77178297720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b02ae8b9-bdf4-4f87-b64f-0cf2f5d51eba/kipufuwagajuvama.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/sutisefukasavifegufiwusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fccb2256-21bc-43e8-9de9-987f9383ab8e/marketing_executive_jobs_in_bangalore_for_freshers.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_off0001612f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1612F 5388 bytes
SHA-256: cf84a02f229ea4f1db9331b3f0aa1b2e557a06e843e9931a8aa3f525b4f2ef89
font_01_sfnt_off000173a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173A8 12024 bytes
SHA-256: bd597f52c1decdff3b27eb5b40e16d6a2b8029460ee1d28f516ac7553de4454e

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