Malicious PDF — malware analysis report

Static analysis result for SHA-256 6394a6b7fdf22786…

MALICIOUS

PDF

68.3 KB Created: 2021-03-17 07:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3b1b5f2797bbeddc140bd536005bdc5c SHA-1: 9a6d951870b83c045d9d078a515a1fc3601daa31 SHA-256: 6394a6b7fdf227867ee7e695b3413e7cd1e6ef0674e76a777a2dade4073d6456
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one prominent URL pointing to 'baarspo.ru' and associated with a 'free pdf' keyword, suggesting a lure for users. Heuristics indicate the PDF is a link farm on disposable hosting, and ClamAV detection confirms it as a phishing trojan. The presence of embedded JavaScript, though obfuscated, likely facilitates the redirection or execution of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=stephanie%2527s+ponytail+free+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373261/normal_5fd975237c66d.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/canon_powershot_a720isdriver_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_60439254dbeb7.pdfIn PDF document text
    • http://neyroskakalka.site/gujibepisuserunudekof9smm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417123/normal_601a1c03c03dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_6011ed4a57bc9.pdfIn PDF document text
    • https://cdn.sqhk.co/bovutolomevo/RijATgg/rocket_car_ball_game_mod_apk_download.pdfIn PDF document text
    • http://bagidopivulo.mywebcommunity.org/66935236823.pdfIn PDF document text
    • http://50off.pro/how_to_gain_wisdom_according_to_the_bible44urz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446638/normal_5fe7d872cb537.pdfIn PDF document text
    • http://4kuhd.me/jawbone_big_jambox_manual_reset2044m.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/iihij6e/claw_machine_master_online_claw_machine_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_604d10f3ba82a.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/8338825698n4dqs.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/elementary_differential_equations_and_boundary_value_problems_solutionshn2qg.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/9ca31471-35fb-4c89-85b6-0e558ece5ab5/96749431700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f5822f-6830-4580-be5e-4e07aaa4e97a/eight_limbs_of_yoga_patanjali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4734929-3a56-4f47-b37f-ccef9aacefff/how_do_you_become_culturally_competent.pdfIn PDF document text
    • http://madepadejatutof.onlinewebshop.net/how_can_i_play_microsoft_flight_simulator_2020_on_xbox.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_off0000cea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA8 5368 bytes
SHA-256: b28eb2e7f91e5afabbe01a7512b7678590e6a3a9f897129a56082b2ab68f606c
font_01_sfnt_off0000e0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F1 9844 bytes
SHA-256: eb3e28e49bd552946ff78a259b185e1abecdb9642622c340c5ef229f40d8cdac

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