Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcdf278b3b2887d…

MALICIOUS

PDF

73.4 KB Created: 2021-06-10 03:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 715a8d73f0c1bb406af4615c60e444c1 SHA-1: ed664e22e03b851e13b82e25739d09de120c9964 SHA-256: 9bcdf278b3b2887d7a74fed289a0aeb89d83c8531c3d58bcffe2efd4236b13e9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URIs, many pointing to disposable hosting and employing UTM parameters, strongly suggests a phishing or link-farming attempt. While no scripts were explicitly extracted, the PDF structure and the nature of the embedded links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://synerhu.ru/pbw?utm_term=gta+apk+data+obb PDF link annotation
    • https://pokenavij.weebly.com/uploads/1/3/4/8/134892290/manogixe_mapoxivagam_vetelola.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456999/normal_5fcedbf04b851.pdfIn PDF document text
    • https://sotemupavunu.weebly.com/uploads/1/3/1/4/131413148/0e658b3247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416806/normal_5fd1a8e4b7ce8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452395/normal_5fc7ed6e72fdf.pdfIn PDF document text
    • https://lajezufil.weebly.com/uploads/1/3/4/6/134636359/2641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_60613c57ae06e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_6011b029b1997.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://febevolojezu.pbworks.com/f/96879275686.pdfIn PDF document text
    • http://pulixojesu.pbworks.com/f/aimbot_free_fire_ios.pdfIn PDF document text
    • http://zapibibilubo.pbworks.com/f/52114931554.pdfIn PDF document text
    • http://tulezibat.pbworks.com/w/file/fetch/144909729/spelling_exercises_for_grade_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f20ce1fd-398c-4098-8c01-61fda0690c59/religions_of_the_world_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e249315-5c47-4c9f-a216-77d35cf25309/8745626118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde9d7a8-d805-4cd8-9581-4106223af1fa/six_types_of_socratic_questions.pdfIn PDF document text
    • http://natofuke.pbworks.com/f/4052620554.pdfIn PDF document text
    • http://bepisoxu.pbworks.com/w/file/fetch/144441138/23515402147.pdfIn PDF document text
    • http://wejojixi.pbworks.com/w/file/fetch/144997401/zalijusogolebuxukibupexit.pdfIn PDF document text
    • http://finebov.pbworks.com/f/89752700993.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/f/cell_organelles_and_structures_maze_worksheet_answers.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_off0000e42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42C 4880 bytes
SHA-256: 3248607fdd4eadaf1a62854e4ab35c194fcde92d9a9be908ee5a0f042ab1f6b1
font_01_sfnt_off0000f4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DB 10524 bytes
SHA-256: fdb60c507ae8bdf3c4e7371008ef37800cd2851f5ed7e2531c1caf53f9a152b9

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