Malicious PDF — malware analysis report

Static analysis result for SHA-256 e485f653baa3568f…

MALICIOUS

PDF

99.8 KB Created: 2021-02-14 10:19:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2f187e5f5937728af67336af6dbd9e29 SHA-1: 27402bd88831a5721383ac92f9b17aa0b6c44bb9 SHA-256: e485f653baa3568fd4292b4f2cfdfe4fd660009c9974e394d4e3efae43b3145f
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 0.9997

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://maypoin.ru/aws?utm_term=bengali+baul+song+audio PDF link annotation
    • https://cdn.sqhk.co/dufubimaru/gejhcjc/voltage_drop_calculation_for_single_phase_load.pdfIn PDF document text
    • http://dunetetemob.22web.org/widutolokivuguluxamajilil.pdfIn PDF document text
    • http://vk-settings-change.online/loregevabusenu4o9q.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/lethal_league_blaze_unlock_guidefr0oq.pdfIn PDF document text
    • https://cdn.sqhk.co/popuzanuguw/iejcXGh/tap_build_number_seven_times.pdfIn PDF document text
    • http://nuwiratuzitezep.22web.org/keithley_2100_datasheet.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/nanda_2018_espaolem3wn.pdfIn PDF document text
    • http://tosety.xyz/ci_tt_mt_trong_ting_anhs4fip.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/XjfibMT/history_of_the_world_part_1_tongue_gif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/29744128762.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/wenudeniwepusexulo.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/99176293316.pdfIn PDF document text
    • http://xegubidutanaza.epizy.com/bhojpuri_song_3gp_mp4_hd.pdfIn PDF document text
    • http://wonitijaxexilo.rf.gd/zawekaporid.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_off00014d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D8F 5088 bytes
SHA-256: 2d7d96ebe952982f11f49205e557b953a25c53e77ee56ca2437a310e3e38aa7b
font_01_sfnt_off00015eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EEA 10568 bytes
SHA-256: 4905f2bc60137eab6fb5f0e409a71ad872541f38a862b348fffa343233d4dcdd

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