Malicious PDF — malware analysis report

Static analysis result for SHA-256 6289f430de563512…

MALICIOUS

PDF

78.9 KB Created: 2021-03-24 13:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 71440bab808e8d066b94767cb8a62b98 SHA-1: daf2ce56a32b57d09782970497e863fad1e254a9 SHA-256: 6289f430de563512ee3a71a040860f0e4a0915298bbb616bd9be689bcc8766ee
194 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/123?utm_term=capriccio+catalano+sheet+music PDF link annotation
    • https://cdn.sqhk.co/fasotaluvose/ijvjigg/sanafasewasurod.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/mathematical_modelling_course.pdfIn PDF document text
    • https://xipejefokodidub.weebly.com/uploads/1/3/4/6/134612454/riwafetovirijux-wavisaw-jesav-jidepuriwo.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/ijbjWiB/mechanical_keyboard_keycaps_custom.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/LicFwyx/nitofegexexisonew.pdfIn PDF document text
    • http://wiwovurezibaso.getenjoyment.net/27875472965.pdfIn PDF document text
    • https://gumulopeviw.weebly.com/uploads/1/3/5/3/135348062/131df8f25b.pdfIn PDF document text
    • http://goossyy.online/cyber_hunter_hack_aimbot_pciv2iy.pdfIn PDF document text
    • https://cdn.sqhk.co/zanaforare/4WrYlwb/piggly_wiggly_store_manager_salary.pdfIn PDF document text
    • https://sakuvajavabese.weebly.com/uploads/1/3/1/3/131383602/c79a0d2e2.pdfIn PDF document text
    • http://xitawefavam.medianewsonline.com/osho_courage_the_joy_of_living_dangerously.pdfIn PDF document text
    • http://siloxolilalapas.22web.org/just_already_and_yet.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/EbtigD1/budox.pdfIn PDF document text
    • http://supsun-aero.com/74241520349yubgx.pdfIn PDF document text
    • https://xekelubapakam.weebly.com/uploads/1/3/4/4/134499273/d4680.pdfIn PDF document text
    • https://fekagisikazepi.weebly.com/uploads/1/3/4/6/134680816/099729da3.pdfIn PDF document text
    • http://varnisvakq.ru/happy_new_year_porn_gifxshd6.pdfIn PDF document text
    • http://befigter.xyz/428969743471gqmn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_d83a47bcd289415d81446119085fb0af.pdf?index=trueIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_21097cc8c3044dae87e567ddbe5edfca.pdf?index=trueIn PDF document text
    • http://kipazafar.atwebpages.com/maytag_2000_series_washer_not_working.pdfIn PDF document text
    • http://rexawisoza.epizy.com/traxxas_summit_1_16.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000decb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECB 5076 bytes
SHA-256: 563826da089e9fa8b02e7af0b9ce22858e52f0e06f8a2fbff9d6a08cb8c8c920
font_01_sfnt_off0000efdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDF 11776 bytes
SHA-256: 7955b7cb561067d1cea57c0ebf349a6544d2216e0daaa6eb57b9619e6b89dfa6
font_02_sfnt_off00011788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11788 16096 bytes
SHA-256: 61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2