Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca7c3d2c38a3aee…

MALICIOUS

PDF

77.8 KB Created: 2021-06-10 12:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 40adefde67e0bc57c52266471ccd838c SHA-1: 03e34e58399c9f13a50a3465f92d661991070ff6 SHA-256: 2ca7c3d2c38a3aee6125f0b2a71ab4e15c6acd6b908e53709a4eb75784c2e457
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting services and link farms, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to download potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://infrive.ru/pbw?utm_term=hollywood+movie+download+in+tamil+isaimini PDF link annotation
    • https://nivosuvadifo.weebly.com/uploads/1/3/5/3/135384950/2208961.pdfIn PDF document text
    • https://karoxenerom.weebly.com/uploads/1/3/0/7/130739074/jodorefa.pdfIn PDF document text
    • https://webonuru.weebly.com/uploads/1/3/1/4/131437172/kisezede_dadizow_sutoxuxopilolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411944/normal_603d3bfeaf42d.pdfIn PDF document text
    • https://vogavowaxataner.weebly.com/uploads/1/3/4/2/134266619/ddec975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414153/normal_60c12ab3c8f24.pdfIn PDF document text
    • https://bunikesetula.weebly.com/uploads/1/3/0/7/130739723/govuxusewapid_jutet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458840/normal_605d8859ef74a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386366/normal_5fff0f425cc57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_604378ce6e1d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495392/normal_60012ac9cc44f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sajateves.pbworks.com/w/file/fetch/144833589/how_to_decline_a_low_paying_job_offer.pdfIn PDF document text
    • http://demopefo.pbworks.com/w/file/fetch/144527178/91408041561.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/f/41787998606.pdfIn PDF document text
    • http://kepigiwup.pbworks.com/f/linear_programming_word_problems_worksheet_1_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e427559-fc76-4914-81f1-382c1709ca30/89685616302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d303d0b-ef8c-4d4b-b94e-62080e5961ff/scag_36_inch_mower_for_sale.pdfIn PDF document text
    • http://xujefix.pbworks.com/f/xubuku.pdfIn PDF document text
    • http://gemometis.pbworks.com/f/maths_grade_10_caps_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3cf23a-96df-4e1f-9128-c76fabd12947/visual_studio_2013_tutorial_for_beginners_c.pdfIn PDF document text
    • http://zakikumese.pbworks.com/w/file/fetch/144717945/what_size_cannondale.pdfIn PDF document text
    • http://dadilotofexi.pbworks.com/w/file/fetch/144516492/89460054105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b553a4f8-409a-4670-b232-d23b607ff5b5/63665193053.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47F 4880 bytes
SHA-256: 9b6d5ee093399063051ca00fdf4860f04e4b3e0493653c843bc013df88c4d998
font_01_sfnt_off0000f510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF510 11072 bytes
SHA-256: 76ba571ee44da84b1c52d8b8f8b88934ecef682ac860a67552531732c74dfe3f
font_02_sfnt_off00011af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF7 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e