Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e63bb050e4c3680…

MALICIOUS

PDF

77.8 KB Created: 2021-06-10 10:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5e15fcddde69529a7eaf8492b2937ffb SHA-1: 15f7daee041b3d2d0a08d123295f9c9159c4c16c SHA-256: 7e63bb050e4c368069a33cebf4379039f821127b34fb210ab2838bf4b5723a07
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 0.9997

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://irlanc.ru/pbw?utm_term=lean+on+audio+mp3+download PDF link annotation
    • https://tulaliferejuza.weebly.com/uploads/1/3/0/7/130775137/xobipetulelev.pdfIn PDF document text
    • https://juzubuju.weebly.com/uploads/1/3/4/7/134703155/fojofokaxi.pdfIn PDF document text
    • https://tedifonag.weebly.com/uploads/1/3/1/1/131164063/fepezudotudibidulef.pdfIn PDF document text
    • https://wawawafux.weebly.com/uploads/1/3/4/8/134896626/536333.pdfIn PDF document text
    • https://wesoxuzepa.weebly.com/uploads/1/3/4/3/134372623/vamune.pdfIn PDF document text
    • https://xivixomepovi.weebly.com/uploads/1/3/4/5/134518427/f0927479f855bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420431/normal_60213ffae1d32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458848/normal_60233b3aa68f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_604d0946b1da9.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://tufukamapaf.pbworks.com/f/need_for_speed_undercover_keygen_download.pdfIn PDF document text
    • http://pojaweku.pbworks.com/w/file/fetch/144464073/kixejadunor.pdfIn PDF document text
    • http://tujedet.pbworks.com/w/file/fetch/145000185/poroleligeneg.pdfIn PDF document text
    • http://molosafokaji.pbworks.com/w/file/fetch/144678942/cooking_fever_gems_hack_2020.pdfIn PDF document text
    • http://giwupiraride.pbworks.com/f/16459626087.pdfIn PDF document text
    • http://noxiwako.pbworks.com/f/los_7_habitos_de_los_adolescentes_altamente_efectivos_resumen_habito_3.pdfIn PDF document text
    • http://kapetipubi.pbworks.com/w/file/fetch/144426462/mit_lock_picking_guide.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/w/file/fetch/144738711/problemas_de_fracciones_faciles_con_respuesta.pdfIn PDF document text
    • http://pefumugat.pbworks.com/f/fexigiruj.pdfIn PDF document text
    • http://fogofalo.pbworks.com/f/insta_story_download_copy_link.pdfIn PDF document text
    • http://giwupiraride.pbworks.com/f/writing_solid_code_2nd_edition.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_off0000e687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE687 4828 bytes
SHA-256: 3ede2656819eff69c06a3f3a2855ceb73d2c8909aa64f45a3174d5f4f8268787
font_01_sfnt_off0000f6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EC 10892 bytes
SHA-256: 633aa9e01f2ffb703a65f23834331fbceb1ecadae62eff2b5624b7ee852dfa12
font_02_sfnt_off00011bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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