Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1ad9a191768421…

MALICIOUS

PDF

80.1 KB Created: 2021-03-27 20:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1f1ac73780bad1563252ecb92df2d072 SHA-1: f142a731318d89e3cf65a053533eb40b3ba0cfae SHA-256: 9f1ad9a1917684214d0e989e1f574844908d6e8ec0916126295a9be3eb1b2a19
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The primary URL, https://seumenha.ru/wix?keyword=fallout+nv+load+order+guide, is likely a lure to direct users to malicious content. No scripts were extracted, but the PDF structure itself is used to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/wix?keyword=fallout+nv+load+order+guide PDF link annotation
    • https://cdn.sqhk.co/tefulobesa/cOginhe/boduxusijudabaxulasepi.pdfIn PDF document text
    • https://cdn.sqhk.co/nilulugaj/dHjhDgd/29587586752.pdfIn PDF document text
    • https://cdn.sqhk.co/dofulokune/Qghhjyb/global_tech_experience_change_simulation_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/Yica2KX/old_school_r_b_music_free_download.pdfIn PDF document text
    • http://findssldz.xyz/what_are_some_safety_procedures_weightlifters_need_to_followmqqp5.pdfIn PDF document text
    • http://socialwave.me/relative_clauses_worksheet_british_councilfoo94.pdfIn PDF document text
    • http://suruxawabasi.iblogger.org/is_steak_tartare_safe_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/iiTgcgj/sifuxefuwini.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/fTiejeP/25245970178.pdfIn PDF document text
    • http://allostar.buzz/debt_5000_years_reviewgnjb6.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/09iaUaO/pikavoxizebibasepoxibulim.pdfIn PDF document text
    • http://trells.space/9449367947832s8b.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
    • https://05f6fcc2-a4c7-4d5b-b58c-97b640a93f4d.filesusr.com/ugd/74147a_8f36a4f1ed384415b5cda6b6ac907c36.pdf?index=trueIn PDF document text
    • https://c4647614-9ff8-4b00-b819-08dc938bd166.filesusr.com/ugd/5d3f24_26231c37c3cd4614a1fa02f6b4c3577b.pdf?index=trueIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_f62a509b5e174e9f9a8c7c3abbeaedfc.pdf?index=trueIn PDF document text
    • https://ea0a6730-5b47-42bc-899c-5b27b21b32ea.filesusr.com/ugd/184298_077092aa37eb4a51907183e68b47c48b.pdf?index=trueIn PDF document text
    • http://forofadikov.rf.gd/25006745793.pdfIn PDF document text
    • https://f3ea461b-95fd-44cf-949c-5afda193840f.filesusr.com/ugd/a48928_f9d50d4ccb87449b87c057730e03787a.pdf?index=trueIn PDF document text
    • https://9f503c4c-bf14-4dcb-9a7a-68e0e5bb3568.filesusr.com/ugd/8ac1ab_0af4ea69a76d4e84a47159581f48dddd.pdf?index=trueIn PDF document text
    • https://5926284e-b61c-4ed0-95e5-27b9feedd2c3.filesusr.com/ugd/50c35f_606a9d30a81a421ba6fa24373b11ec32.pdf?index=trueIn PDF document text
    • http://verejepaw.epizy.com/56816288319.pdfIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_3a1b2bb5959f4b0abb0c294fa942f781.pdf?index=trueIn PDF document text
    • http://kevixavi.rf.gd/81335684075.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_6b7e00a2b5a74d398e33dfe7f29cb6d5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED82 4712 bytes
SHA-256: d812fb874b6fbf7e710835d4d7c8c2ed0a67cfb1292c7fac233566f159dcc2aa
font_01_sfnt_off0000fd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD96 11364 bytes
SHA-256: fd4d583c15126228c58d6f97ec22e8e4c1f860629e72fc85538db728a758818c
font_02_sfnt_off00012356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12356 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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