Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3c9f2b1262eddb…

MALICIOUS

PDF

175.2 KB Created: 2021-03-27 09:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 47d890e47cc687206c0b5b04a5788f27 SHA-1: 2149eaf5f78a36db5531f89fb3ff483af26d07b8 SHA-256: fa3c9f2b1262eddb311407ba327928bb32314e8b999e0636254920996845ff5a
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 0.9958

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/award?keyword=basic+electroencephalography+pdf PDF link annotation
    • https://setibadumizokeg.weebly.com/uploads/1/3/4/8/134880372/niginurefed.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/hZON8hb/adventure_super_mario_bros_wii_download.pdfIn PDF document text
    • http://phillipen.online/what_does_culture_means_to_youf3di0.pdfIn PDF document text
    • https://dibasipelop.weebly.com/uploads/1/3/0/7/130738559/dazozarovebakivu.pdfIn PDF document text
    • https://cdn.sqhk.co/desiketomasu/oIqlt8a/rational_exponent_equations_worksheet_with_work.pdfIn PDF document text
    • http://dorubugupik.22web.org/soxewewegeseragirubezo.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/gBgihbN/10003033605.pdfIn PDF document text
    • https://cdn.sqhk.co/tedatekalo/ifhcign/reaction_kinetics_lab_answers.pdfIn PDF document text
    • http://prostotit.site/examiner_report_igcse_physicsarumh.pdfIn PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/35916a81a1.pdfIn PDF document text
    • http://naturfresh.space/jinisujegizopagedifopoowcnj.pdfIn PDF document text
    • http://zolomakowifop.iblogger.org/electrical_engineering_handbook_unsw.pdfIn PDF document text
    • http://datingsexchat.site/je_vous_prie_daccuser_bonne_reception8mnsj.pdfIn PDF document text
    • https://cdn.sqhk.co/jezuleku/mifGhgh/mavajizudarawa.pdfIn PDF document text
    • https://pibusabet.weebly.com/uploads/1/3/4/6/134695111/5216893.pdfIn PDF document text
    • http://ulekschool.online/likoniwepawasafiraxonok8fnf3.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/gisujubolidine/wovopabefapozaverexutof.pdfIn PDF document text
    • http://gelapuduwo.epizy.com/30817910993.pdfIn PDF document text
    • http://lefatogilag.rf.gd/pioneer_vsx_532_5.2-channel_av_receiver.pdfIn PDF document text
    • http://zesubilav.epizy.com/pobukojukefutefo.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/giwodakes.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/mrp_chain_guide_and_bash_guard.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/73735329226.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_off000259e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x259E3 5568 bytes
SHA-256: 4800a09f854ce721f86a774021026320fe0eeece6212a2128e8e4c729558ac44
font_01_sfnt_off00026cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26CD6 13640 bytes
SHA-256: a0ca2e6745e3407705c51c44a2522101e84dbd83642efbd511a49ac6527dffcf
font_02_sfnt_off00029953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29953 16132 bytes
SHA-256: 6c511cd2548aab1566dad8f54fccf2be4cd056cf5a4d5d56937977fde9165995