Malicious PDF — malware analysis report

Static analysis result for SHA-256 7011be42292bab4c…

MALICIOUS

PDF

74.8 KB Created: 2021-06-07 21:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4761c6112e58526861fb6c5cd3ff491e SHA-1: e9ff9e232137f94128981b70b64d17424a635f0f SHA-256: 7011be42292bab4cd095156ca8dc3ec094614c0c227dd9b4307a2b8ed13ead7a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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 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://wastran.ru/pbw?utm_term=maths+olympiad+for+class+4+worksheets+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459463/normal_600d41c8bedf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491723/normal_60bdaad9bccac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_6067a4ed83013.pdfIn PDF document text
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/mawojojif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_6027a595158d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466996/normal_601dc298f2864.pdfIn PDF document text
    • https://pekupepavipojev.weebly.com/uploads/1/3/1/8/131872203/5699708.pdfIn PDF document text
    • https://xavelimati.weebly.com/uploads/1/3/5/2/135298033/8a80a24fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366654/normal_5fdf0b5788815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492246/normal_5fcf4459ad4c5.pdfIn PDF document text
    • https://xijuwubime.weebly.com/uploads/1/3/4/2/134234920/gokoderegapu-wosomozana-lomora.pdfIn PDF document text
    • https://dijitisabotiji.weebly.com/uploads/1/3/5/3/135324222/mifepago-mobirozigi-betigisidim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393898/normal_60694c1578a72.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144629532/xisito.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/w/file/fetch/144487350/vision_pro_8000_commercial_installation_manual.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/f/samsung_j3_2016_adb_driver.pdfIn PDF document text
    • http://sagidetubi.pbworks.com/f/camtasia_studio_8_1_portable_descargar.pdfIn PDF document text
    • http://gibabug.pbworks.com/f/fopapibadefa.pdfIn PDF document text
    • http://malamojozag.pbworks.com/w/file/fetch/144665208/anatomy_and_physiology_coloring_workbook_answer_key_chapter_15.pdfIn PDF document text
    • http://mivegaz.pbworks.com/f/how_to_read_candle_wicks_crypto.pdfIn PDF document text
    • http://gitefov.pbworks.com/w/file/fetch/144571125/superman_and_me_sherman_alexie_summary.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/f/wow_classic_healbot_druid_setup.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_off0000e672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE672 5748 bytes
SHA-256: 095ec47874e2077c5321504680cdbc784ad68dde628dea6b3b67f58adfe222d9
font_01_sfnt_off0000fa01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA01 10728 bytes
SHA-256: 8aa9f34fdcc4ccc041341b553eee61d5978525ad135eee9ca58be7b8be5fab52

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