Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20d25cd28a0cfe1…

MALICIOUS

PDF

91.1 KB Created: 2021-04-25 15:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e4b47eadac8610ca99c470b21cc66175 SHA-1: b00fa42b2cd427376e52c926a9affec79aa687d9 SHA-256: e20d25cd28a0cfe1a39ef81064da3dfb42c4599a57e8ae317bb77e9b59f1101a
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 0.9997

Heuristics 5

  • 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.
  • 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/strik?utm_term=dometic+duo+therm+ac+shroud PDF link annotation
    • http://dilawiputonu.mypressonline.com/adverbs_of_place_worksheets.pdfIn PDF document text
    • http://dozetekotod.22web.org/2001_subaru_outback_wagon_mpg.pdfIn PDF document text
    • http://tezijexipilimo.getenjoyment.net/fidasodebefaza.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/kimogejiwok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_9cc0f66a1ee847bda641765f64307dd8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jikopot/webpage_to_chrome_extension.pdfIn PDF document text
    • https://aaa8450b-5959-4376-bf95-5e5e4b45aab3.filesusr.com/ugd/bcfc74_2179d8dc960042e4838a91cd3dd355d8.pdf?index=trueIn PDF document text
    • http://nezugetojuf.myartsonline.com/asianet_broadband_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a6ff9db-82f1-481f-99e3-785508db741e/juzawodoboluxumeledo.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/6043819211.pdfIn PDF document text
    • http://vunonam.atwebpages.com/diana_gabaldon_outlander_audiobooks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb67a34-e857-4fb5-a7b0-60b49a6678ca/17326097159.pdfIn PDF document text
    • http://xiniwipilanaju.atwebpages.com/zudomizajapipidufawetawi.pdfIn PDF document text
    • http://fatofejeripise.rf.gd/bodyboss_superfood_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac2d7394-9eac-46e9-a118-dfa6d3beac86/best_free_movie_maker_software_for_windows_10.pdfIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_a1c3ac41f27143f08e53be16d855d4b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kakef/53748872549.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_2c490763a6f44582a06217aeaae8ce11.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/graph_exponential_and_logarithmic_functions_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE879 20832 bytes
SHA-256: d1886c3a13ee2c6dc49c532aa96fdc350b6909f3a267a4822e0a3c898b98600a
font_01_sfnt_off00012486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12486 5144 bytes
SHA-256: d37ce55e196707ff196ebd6f9935c5eabf61e3c9063a07499ffe060ececd0aef
font_02_sfnt_off000135d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135D8 11160 bytes
SHA-256: f58409af6efcdbae4e734563c85847d4b8565b9d6bf56e36d744db1cdbb529c8

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