Malicious PDF — malware analysis report

Static analysis result for SHA-256 084704616702d310…

MALICIOUS

PDF

74.7 KB Created: 2021-03-04 18:30:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f840fff3c51562d1f8026ad4901615ac SHA-1: ad228cd3ee9575d49b9d0ac372eb05216fd6a32b SHA-256: 084704616702d3105c1fdb2e6e6942b5eabbd13eda7ffa96a84cc63254e84164
126 Risk Score

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 0.9998

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://dugedepap.ru/123?utm_term=how+to+activate+spartan+camera PDF link annotation
    • http://byseles.xyz/crossfit_workout_outfitscv9la.pdfIn PDF document text
    • http://pojapusevipuzu.mypressonline.com/when_did_you_start_high_school_if_you_graduated_in_2015.pdfIn PDF document text
    • http://pedrons.space/jogawelegejizexu023.pdfIn PDF document text
    • http://aydym.club/12688492474lo6oa.pdfIn PDF document text
    • http://opt15.ru/minobufelejigomikisowuxaadwka.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/biodata_format_for_muslim_marriageh2lbb.pdfIn PDF document text
    • http://leftoutclub.com/us_army_address_for_unemployment7eiv9.pdfIn PDF document text
    • http://shop-you.xyz/kitimesomuvosinogidorikzh62.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/37118166020.pdfIn PDF document text
    • http://kanshoper.site/chudi_jo_khanke_reply_song_freen1k0j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jisijuvod.myartsonline.com/pelutuwos.pdfIn PDF document text
    • http://pijularof.epizy.com/edit_to_word_online_gratis.pdfIn PDF document text
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_05dcd59dcf794de793488435399c76c1.pdf?index=trueIn PDF document text
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_7ad98eb6dcb24776b9f31431a6bb07d6.pdf?index=trueIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_aab7dd7002d44c13aa5436e33885dac9.pdf?index=trueIn PDF document text
    • http://vekalaluno.epizy.com/zatabuwur.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_off0000e567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE567 5160 bytes
SHA-256: d2404db9126cd91e977adfb9daa069be79372c6c73573879942a249255b007f9
font_01_sfnt_off0000f6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 11500 bytes
SHA-256: 05968657538a15eda5b6d280be0ff9f7e456f7e5765c8dce84ec9b085b1c4147

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