Malicious PDF — malware analysis report

Static analysis result for SHA-256 647b28d6e25a9331…

MALICIOUS

PDF

76.4 KB Created: 2021-05-08 21:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 08776e289e67d9df7e47907a1ba5dfa3 SHA-1: 58e4c79e20f9bf15d2e5e63fe570e6b1d9ba32fb SHA-256: 647b28d6e25a933160f39371482fd945550189257e610c1a1d40707af2475018
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://leonvi.ru/strik?utm_term=what+are+non+programmed+decisions PDF link annotation
    • https://cdn.sqhk.co/nugunexinazo/RjcYT0C/playroom_decor_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/j1ojhij/35864447806.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/nghrhek/gigalife_app_promo.pdfIn PDF document text
    • https://cdn.sqhk.co/matajikiwov/fxhjhia/cyberpunk_2077_samurai_phone_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/mewoveri/prjbaib/nbc_sports_gold_free_login_and_password.pdfIn PDF document text
    • https://cdn.sqhk.co/nemoludajedu/bhihahf/tijotilanoguz.pdfIn PDF document text
    • https://cdn.sqhk.co/nazabimon/gcqjecJ/define_diaphoretic_medical_terms.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/2uZifhg/12396267437.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/Aeicnhi/87108824334.pdfIn PDF document text
    • https://cdn.sqhk.co/jebozibiru/ji2icje/29994040058.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/oiivenJ/30706419505.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f13c3764-afa1-415a-9d75-0562755cf0d9/white_rodgers_thermostat.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/anarkali_malayalam_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ad8b4c8-cb10-4774-9ed3-1ccd69d98112/buvegogumuvudedurugi.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/78443042180.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/fozobarorina.pdfIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_f2248e03da874c6f93a1c433a31d5e94.pdf?index=trueIn PDF document text
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_9ff2986c7e7d44499dd6067bbcbac0e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/903c4de2-3ddd-4dc2-aecc-370801fe14e1/fantastic_beasts_and_where_to_find_them_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/science_8_electromagnetic_spectrum_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b19f1ae-5525-44f8-a926-6e2212961051/ac_booster_rc_booster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da4e831-c098-4ea8-a6f7-db16a8d73fe0/how_to_troubleshoot_a_maytag_bravos_washer.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 5468 bytes
SHA-256: 0b27fe1744b6679f0951c45fc114dc70a7f9c480f5968888279096acaee1e068
font_01_sfnt_off0000fe63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE63 11092 bytes
SHA-256: 64d2793b1a85b70df955168e78c1511b022c07df62952b8059716a152d32ce46

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