Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0418dfbf163a735…

MALICIOUS

PDF

75.6 KB Created: 2021-03-21 01:54:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9953aa189c921601fe984d46a1abe378 SHA-1: 3ae75c2b920a045dc6fd5b30a51a892c9180de4a SHA-256: d0418dfbf163a73547e1acfc0b6996118deab6026e02cea534a84336a79ea115
186 Risk Score

Malware Insights

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

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 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/wix?keyword=clover+hill+golf+course PDF link annotation
    • http://fsbsiod.com/92347360071hof27.pdfIn PDF document text
    • http://particulieres-societegenerale.best/posedoscta.pdfIn PDF document text
    • http://lg-copyrightforms.com/92962966631fadkn.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/jaFX3fm/funny_videos_2020_whatsapp_download.pdfIn PDF document text
    • https://cdn.sqhk.co/luvunugoz/BJhiagh/19281229509.pdfIn PDF document text
    • http://wonder-ita.space/nursing_drug_handbook_2015_free_downloadvzpq7.pdfIn PDF document text
    • http://respect-ltd.su/how_do_you_turn_off_the_security_light_on_a_subaru_foresterwmg6s.pdfIn PDF document text
    • http://theharaka.online/duvabodubavadobodah6l4r.pdfIn PDF document text
    • https://cdn.sqhk.co/nogugojuri/riiegcD/8_ball_pool_unblocked_games_76.pdfIn PDF document text
    • http://netlysy.online/what_are_alyssas_5_mental_health_disordersus0j0.pdfIn PDF document text
    • http://belkwigs.com/2006_chevy_malibu_lt_specs7m809.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/zezaronisezsh1td.pdfIn PDF document text
    • http://reduslim-italy.site/461381851689j4o5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_48e5e59b6bbb462181f3c1f2371d8e63.pdf?index=trueIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_23c8f14a11d9400ebac0805ac4121123.pdf?index=trueIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_75d56a9c4798405883c574f671cb500b.pdf?index=trueIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_40a80381543646a38bf6bec73a72cf77.pdf?index=trueIn PDF document text
    • https://6ae5a9c1-8526-45f7-b068-03ddf2465b28.filesusr.com/ugd/87f732_6fd4d25ad0794997aedd713192f083b1.pdf?index=trueIn PDF document text
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_5defd0cc39ce4973891b77bb20f83088.pdf?index=trueIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_b84537c01b124ac1b221c0e0abb3a540.pdf?index=trueIn 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_off0000ecbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBB 4896 bytes
SHA-256: 8076b4b48b1ffa6524721f3f56d006736dfc02eb57fdf5739cbf4073d1811ba3
font_01_sfnt_off0000fd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD72 10548 bytes
SHA-256: 62235162576ec2eba3c39fe60820743bd9523736069f402fd7ba4d473e94e09e

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