Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0f6c0280828ba1…

MALICIOUS

PDF

79.4 KB Created: 2021-03-05 07:18:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4a6a9e938171c7b9e5d12b8f99de4659 SHA-1: 25462c47e28b520d4e6b8014f16c85ed11686bab SHA-256: 7c0f6c0280828ba1213c9c23dfe260eb0b832097f0d7c28e65f5ec9f72acf6be
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/wix?keyword=free+printable+cuneiform+worksheets PDF link annotation
    • https://cdn.sqhk.co/fuluzezufe/f2JH5jg/complete_math.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/jvc_kd-s39_wattsz6jw2.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/cGwqgia/zisaxuw.pdfIn PDF document text
    • http://vilopeg.xyz/twilight_graphic_novel_volume_2_scrikve3u.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/super_bino_go_mod_apk_1.0.3fbd6z.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/worupigejesi.pdfIn PDF document text
    • http://bossyonlinex.com/brother_mfc_240c_replace_ink_cartridgec0g1a.pdfIn PDF document text
    • https://dakufosaxem.weebly.com/uploads/1/3/4/7/134771611/wonamovofube_wiforasizuju_mojekezi_busujezot.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/jctLEpm/jixobepozadafedivewadugal.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/mekatasorabilokutovaz.pdfIn PDF document text
    • https://pixasarajesuwov.weebly.com/uploads/1/3/4/6/134688766/gazar_povewalarug.pdfIn PDF document text
    • http://pochta-24.cc/224766335070aoir.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/st_francis_retreat_house_easton_pa.pdfIn PDF document text
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/fozebexab.pdfIn PDF document text
    • https://cdn.sqhk.co/ratobomebal/ieUjhje/jesusagemazuvagunopifagu.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/purple_cow_seth_godin_quotes.pdfIn PDF document text
    • https://jizotigop.weebly.com/uploads/1/3/0/8/130874082/bd3ea712bdd.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwesedujila/ia5qv67/23278055602.pdfIn PDF document text
    • https://sexeduju.weebly.com/uploads/1/3/5/3/135327292/6533333.pdfIn PDF document text
    • http://korogesubelokut.mypressonline.com/wozatosikenuv.pdfIn PDF document text
    • https://pajowivi.weebly.com/uploads/1/3/4/9/134904739/kelorodupukemipav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gurabagoderes.atwebpages.com/does_tegrity_record_your_screen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5C 5388 bytes
SHA-256: 287422015c066f4221bc7b45d9713b73bf3f07458c8a00e90351c842da472f6f
font_01_sfnt_off0000fc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC86 10520 bytes
SHA-256: 9e762b1f22cc1476d0fb7972cb3f2829a4629477b5dea56e89757fdbacd4c325
font_02_sfnt_off00012064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12064 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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