Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b28c97e4be2646…

MALICIOUS

PDF

75.0 KB Created: 2021-04-06 19:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bc2a1747f6e6777668976d9d7b375d76 SHA-1: 5108406699f1399e9e4acc32886bcee5d27c9c1a SHA-256: c5b28c97e4be2646cb91382ab1277316e88b053d3e8c23b3fb5977f79f63d2d8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/123?utm_term=illuminati+card+game+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365576/normal_6007d4445943d.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/kjdiexf/fireboy_watergirl_in_the_crystal_temple.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/Rhicthi/febawisenobesefo.pdfIn PDF document text
    • https://cdn.sqhk.co/fudopalizew/ihd4fK1/minecraft_jurassic_world_seed_pe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483873/normal_5fd0e476dec84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393180/normal_600d7bc2d3a36.pdfIn PDF document text
    • http://ragofilud.medianewsonline.com/fitasame.pdfIn PDF document text
    • http://idealicaitalia.website/25133422968ifoqi.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/dhatYkv/45942612194.pdfIn PDF document text
    • http://ital-tess.space/monthly_bill_organizer_excel_templatemgxk3.pdfIn PDF document text
    • http://janafan.scienceontheweb.net/struts_framework_book.pdfIn PDF document text
    • http://welitizenowem.mywebcommunity.org/surah_al_mulk_terjemahan.pdfIn PDF document text
    • http://viwesisikumebi.getenjoyment.net/windows_batch_file_programming_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529893/normal_5ff2320567f12.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/jSYaMLu/79338328322.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/bupuxazeworanuwaxodisap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4def6d0-1378-449c-9fcd-ab26a79f0ccc/96194031687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/043cdb91-f85e-4d00-9c1a-e511b7077ea0/watch_love_in_the_time_of_cholera_full_movie_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/body_reset_diet_review.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/xotiwetoxixefe.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/plural_vs_possessive_nouns_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/21426711352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7343c5b-d7a2-4abc-8a80-98149d8a2636/craftsman_15_amp_benchtop_planer_review.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_off0000e92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92C 5216 bytes
SHA-256: 0ee838830a3a22fede058e5ad167f47cffb1ed6bc42f898934877b2d88202e98
font_01_sfnt_off0000fad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD2 10692 bytes
SHA-256: 0114e9780e9aa900739594b40f0026063774a56d9582bfdcbc0c8dfa2203b17c

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