Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb727d6bed7b3fd…

MALICIOUS

PDF

74.6 KB Created: 2021-03-31 08:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f7730df8e36367fe10abccb7d9643ad6 SHA-1: 9a2134db0182490c688f7f72b3cabd78536872ad SHA-256: 6eb727d6bed7b3fd27f3dadce41ed7cfe35590e4aad3fb0abe8b7d12b7522f64
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 0.9996

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://baarspo.ru/award?keyword=bestiariusz+wied%25C5%25BAmin+3+pdf PDF link annotation
    • http://miromawetibikew.mywebcommunity.org/batodupexunavikavolokero.pdfIn PDF document text
    • https://cdn.sqhk.co/lizasizova/gfCgiRF/79556809546.pdfIn PDF document text
    • http://item-mask.top/lodokebalomepibapugosopugn28vb.pdfIn PDF document text
    • http://vk-settings-change.online/72495635701b6yqs.pdfIn PDF document text
    • http://xebasebidigu.iblogger.org/how_to_charge_the_nikon_coolpix.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/41558183220.pdfIn PDF document text
    • https://cdn.sqhk.co/kopupelek/EMePibL/mad_truck_challenge_racing_play_online.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://kaxazul.iblogger.org/broiler_production_manual_zimbabwe.pdfIn PDF document text
    • http://autoport76.online/mopigotatafukojukuroletus8v3d.pdfIn PDF document text
    • http://sutovuresas.mygamesonline.org/vitagirupilelujopufagi.pdfIn PDF document text
    • https://cdn.sqhk.co/satukevaguka/rDgiggT/true_skate_free_ios_apk.pdfIn PDF document text
    • http://lumogodasekepi.mypressonline.com/juramopeba.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/b8gjhfg/59794033399.pdfIn PDF document text
    • http://titoto.xyz/86128372095fs7l.pdfIn PDF document text
    • http://basiditdcf.space/nile_valley_contributions_to_civilization_wikib0icu.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/jajuzasalikirut/alto_s_adventure_mod_game.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/wakepa.pdfIn PDF document text
    • http://fabavokawibawo.epizy.com/juwodanevadere.pdfIn PDF document text
    • http://jagomizaf.atwebpages.com/intermediate_accounting_14th_edition_solutions_manual.pdfIn PDF document text
    • http://xesidif.epizy.com/fejasebumebapad.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/samsung_j730f_ds_firmware.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_off0000e203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE203 5580 bytes
SHA-256: fd2ee650ac0d73de5c762ca27f72326622111a296196c679f8db25d567df2ad0
font_01_sfnt_off0000f4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FE 11924 bytes
SHA-256: aac1a9646bd8cb8e4d90210e34b1565832fbe31c5bc8f9b1d97943906ce7e8e8

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