Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ceb04148f31c0ce…

MALICIOUS

PDF

76.5 KB Created: 2021-06-08 04:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 34de396c8e7a8a7bd79aafac1a3b9cc6 SHA-1: dab30af3cf870c7265ef23f401410476c180550b SHA-256: 6ceb04148f31c0ce0cdec0cc794ae9c1c277860d2f0ddc1c09bf0fb3ee131cad
186 Risk Score

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 0.9992

Heuristics 6

  • 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.
  • 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://nomylo.ru/pbw?utm_term=jess+le+glynne+clean+bandit PDF link annotation
    • https://mudukexot.weebly.com/uploads/1/3/4/6/134629884/tedikulelerojuf_dewejo_bimerasasaj.pdfIn PDF document text
    • https://fixalurona.weebly.com/uploads/1/3/4/3/134314544/sobisewudajale.pdfIn PDF document text
    • https://fanidadi.weebly.com/uploads/1/3/7/5/137519991/vafom.pdfIn PDF document text
    • https://gebigimudixerez.weebly.com/uploads/1/3/4/3/134374499/tusogodurebesowibotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479674/normal_605c8a8fe6e0f.pdfIn PDF document text
    • https://wamogipoko.weebly.com/uploads/1/3/0/7/130739383/70cebb6.pdfIn PDF document text
    • https://lapumutugafi.weebly.com/uploads/1/3/4/6/134601317/2928077.pdfIn PDF document text
    • https://kokopepexepu.weebly.com/uploads/1/3/1/3/131379351/b8075594.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403823/normal_5febd0d722bcc.pdfIn PDF document text
    • https://mululugasafes.weebly.com/uploads/1/3/1/6/131636627/bc2f2.pdfIn PDF document text
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/0c581dd62d6e392.pdfIn PDF document text
    • https://wutupebepa.weebly.com/uploads/1/3/3/9/133997315/6564447.pdfIn PDF document text
    • https://redulexaxoxega.weebly.com/uploads/1/3/0/8/130874010/e7e3727f1d.pdfIn PDF document text
    • https://xipazodi.weebly.com/uploads/1/3/4/3/134375507/papepo-kadewopugit.pdfIn PDF document text
    • https://rugexosijebup.weebly.com/uploads/1/3/4/0/134017508/1938509.pdfIn PDF document text
    • https://firuruxuzero.weebly.com/uploads/1/3/7/5/137502241/sanomulanekapugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410730/normal_6014f4b721946.pdfIn PDF document text
    • https://xivibivo.weebly.com/uploads/1/3/4/3/134353446/061ecc7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pigedigasexu.pbworks.com/w/file/fetch/144826734/minecraft_among_us_map_download_bedrock.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/f/demonter_garniture_de_porte_306.pdfIn PDF document text
    • http://kirozatijawu.pbworks.com/w/file/fetch/144527118/best_file_manager_android_phone.pdfIn PDF document text
    • http://kusarolox.pbworks.com/w/file/fetch/144682764/subject_verb_agreement_worksheet_grade_7.pdfIn PDF document text
    • http://suniger.pbworks.com/f/aesthetic_neat_handwriting_font_practice_sheet.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_off0000e3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F4 5244 bytes
SHA-256: 5dfd486193f6f398842854d5d5c9eb15e74a5058f3bd1153d2ea9a3a42c289f2
font_01_sfnt_off0000f5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DF 18260 bytes
SHA-256: 0329b506765f54094bda28e08d50e880083b82b75698c86f3e39e0e486856b85