Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c3d2145be78bc5b…

MALICIOUS

PDF

75.4 KB Created: 2021-03-29 18:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7236790f725c153798eb432577136410 SHA-1: 84d56b0b9df7c368b888024f5a40e40f641b53be SHA-256: 1c3d2145be78bc5be99f4b1ac398c57783ca908a633ebfa1a7e1505ce0dc6b3a
156 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. 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 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.
  • 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/123?utm_term=12+month+income+statement+template+excel PDF link annotation
    • http://meetchambre.xyz/foundation_and_earth_audiobook_youtubepzp2b.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/eduardo_galeano_biografiaa5vfi.pdfIn PDF document text
    • http://serviceforyou.site/wujepilafopukukaxork6q50.pdfIn PDF document text
    • http://xefijemav.iblogger.org/what_fairy_tales_were_written_by_the_grimm.pdfIn PDF document text
    • https://vusobodez.weebly.com/uploads/1/3/4/3/134320146/vosefavimel.pdfIn PDF document text
    • http://vevolim.iblogger.org/61892194466.pdfIn PDF document text
    • https://bulejufinekefek.weebly.com/uploads/1/3/4/6/134643919/b01516d75ece2f.pdfIn PDF document text
    • https://laforefuje.weebly.com/uploads/1/3/5/3/135333455/2194030.pdfIn PDF document text
    • http://sqrab.top/advanced_rest_client_mac9nd25.pdfIn PDF document text
    • http://ayazshabutdinov.club/18070458398jy80j.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/pusolefosex/51449858304.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/music_of_the_night_michael_crawford_live.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/trumpet_believer_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/analisis_del_libro_la_metamorfosis_de_franz_kafka.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/what_is_the_highest_rated_electric_toothbrush.pdfIn PDF document text
    • http://novoboninixeme.epizy.com/fitbit_flex_2_bands_argos.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/27591064124.pdfIn PDF document text
    • http://nadiripu.epizy.com/application_template_for_rental_property.pdfIn PDF document text
    • http://pewokes.epizy.com/composite_biomaterials.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/epic_battle_fantasy_5_boss_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/potejaxudatidewezox.pdfIn PDF document text
    • http://durafewiluros.epizy.com/brandenburg_v_ohio_case_summary.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_off0000e759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE759 5232 bytes
SHA-256: cbb3659a97461010bd2a9f649fad787852478424b8e3242084cd06e4b4087570
font_01_sfnt_off0000f90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90A 10876 bytes
SHA-256: 74eb0716707d662ad062c8f7d8dcad42a05dce12d0ce531daa6b057cc8f75f31

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