Malicious PDF — malware analysis report

Static analysis result for SHA-256 4960584ae7976736…

MALICIOUS

PDF

92.7 KB Created: 2021-03-29 01:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8795c0ee0d9efbb4d8394365c0eaccb1 SHA-1: 50706f08abe2aac5c337fa029d8c4482efcdcf9c SHA-256: 4960584ae79767365d2e5fc56482044fee45045b44415109c79dbd957acfb734
146 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'free dreamweaver tutorial pdf download', which is a common lure for users seeking free software or resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://nipisod.ru/award?keyword=free+dreamweaver+tutorial+pdf+download PDF link annotation
    • https://sodumixiseto.weebly.com/uploads/1/3/4/3/134311801/3089579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_5fe6200c035b7.pdfIn PDF document text
    • http://rupaduwovuw.getenjoyment.net/potaxufibanaligumobut.pdfIn PDF document text
    • https://zesojewati.weebly.com/uploads/1/3/4/4/134432656/1334650.pdfIn PDF document text
    • https://desujerobum.weebly.com/uploads/1/3/1/0/131070458/xuxujoxinejuvop.pdfIn PDF document text
    • https://cdn.sqhk.co/jagojixego/fggjgp4/90019452405.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/download_film_fifty_shades_of_grey_2019_sub_indo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484118/normal_604705d239649.pdfIn PDF document text
    • https://xizanubafawadug.weebly.com/uploads/1/3/4/3/134321303/wutuzat_gapulebilonida.pdfIn PDF document text
    • https://modurofeg.weebly.com/uploads/1/3/4/3/134376635/2cda120a983e.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/ZA3ibgj/bubejatu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_5fd2694e8ef22.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/fedoxiraxasojugiwipola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449399/normal_602cd7eddd54c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420451/normal_6023ee4e68cf2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/jupozumigozeleledovuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/84219248274.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/kuala_lumpur_travel_guide_blog.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/what_is_13_reasons_why_about_season_2.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/energias_renovables_en_chile_2018.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/48227741843.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/xewufibiw.pdfIn PDF document text
    • http://pazepoxi.atwebpages.com/xoxezerovejetawubeweja.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_off000128ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128EA 5116 bytes
SHA-256: 624c8c15a3f0a046ac1b294ba37c15d1a1583fbae0093236529edb8bdf69eb0d
font_01_sfnt_off00013a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A56 12260 bytes
SHA-256: 3ddbc068f4a318c105ae829f12b54e8136702912cb8f801b2f8344a5fdcccdd3

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