Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8eb5346bd13387f…

MALICIOUS

PDF

88.1 KB Created: 2021-03-24 10:04:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 26068442964e20cb57ffe9c612f7f22a SHA-1: 8877cc6fc3c1724cc7a09aeaf5329eea3f74d50e SHA-256: a8eb5346bd13387f6a23b655a54680be8f7926f5d31b723150099180d04492b9
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 0.9989

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://vilenefex.ru/wix?keyword=the+one+minute+safety+manager+pdf PDF link annotation
    • http://generatorsale.ru/pifazikzaeil.pdfIn PDF document text
    • http://raisinsapp.pro/kenaj2qsna.pdfIn PDF document text
    • http://pitushok.fun/62057203283pvjr1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492278/normal_600db1a6e7301.pdfIn PDF document text
    • http://passive-income.ru/515825995htu3g.pdfIn PDF document text
    • https://cdn.sqhk.co/zevolazezag/E2jihe2/baby_yoda_plush_toy_eb_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379837/normal_5fde50a5207ad.pdfIn PDF document text
    • http://giocodigital.fun/nezagibawivifilewer7jb7.pdfIn PDF document text
    • http://hookup157.online/44728699453lx9lz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386613/normal_5feb094776820.pdfIn PDF document text
    • http://appletopshop.ru/descargar_norma_iso_14000_completae9vj7.pdfIn PDF document text
    • http://pl50off.info/wabonupinzz9j9.pdfIn PDF document text
    • http://rm-swis-mine.com/liszt_standchen_piano_sheet_musicr0mhl.pdfIn PDF document text
    • https://cdn.sqhk.co/rajexizeba/0hipdTh/tobajizutebajedulofite.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378160/normal_5fe169bdcfba4.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/AxibUhc/munusibuziferovivi.pdfIn PDF document text
    • http://help-service-support.com/11330485044le54v.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/sulejezi.pdfIn PDF document text
    • https://de99934f-f465-4d69-af5e-14f317c0a7c6.filesusr.com/ugd/4fea5c_75751c19bab842a289f4f82710a66596.pdf?index=trueIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_5d23f1338bd04a2082a0c640b971b5bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/95891981029.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/how_to_properly_dye_your_hair_at_home.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/99880594723.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/meilleur_application_android_accordeur_guitare.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010087.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10087 16236 bytes
SHA-256: d907907a5ee5c11de8b930c7853b84fc536e061a59eb9c9a8eadfa79038d0868
font_00_sfnt_off0000ee11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE11 5476 bytes
SHA-256: 9f0ea12cafef1dc82173298043b0b87df5b0d3247b63dba7ae96c788bca37887
font_02_sfnt_off00012cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCE 10560 bytes
SHA-256: fe22ee090b7a6f43f4a7e609e01d754fd5f232ed218d439f2dca26c082495459