Malicious PDF — malware analysis report

Static analysis result for SHA-256 86fd4090d5e31978…

MALICIOUS

PDF

92.5 KB Created: 2021-02-10 20:38:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 645a198773089a0d98f3576eb81643a4 SHA-1: c1723f272e123300b6d28e8632bfe45a49a0f20b SHA-256: 86fd4090d5e31978008146369568a8c68db988849aef6170e15f3f0b09c7234d
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/aws?utm_term=vert+shock+pdf+free PDF link annotation
    • https://tasitovutad.weebly.com/uploads/1/3/0/9/130969559/255bc2f0682cf.pdfIn PDF document text
    • https://pefodiral.weebly.com/uploads/1/3/4/4/134476409/naroxuvuburuv.pdfIn PDF document text
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/nisosizijazet-bemixotepisedu-kedemedigi-jenoxut.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/6f964ffacd1e1.pdfIn PDF document text
    • https://zomimodobi.weebly.com/uploads/1/3/0/7/130739583/nevofenut.pdfIn PDF document text
    • https://nidikibadut.weebly.com/uploads/1/3/1/4/131453007/wazev_weranufarazew.pdfIn PDF document text
    • http://se-mrush.com/appointment_letter_format_for_auditlqwye.pdfIn PDF document text
    • http://smartradiobf.ru/aerodynamics_for_engineering_students_7th_editionqokce.pdfIn PDF document text
    • https://petabururumeje.weebly.com/uploads/1/3/4/9/134902787/d99f9f213.pdfIn PDF document text
    • http://logefekur.22web.org/senafod.pdfIn PDF document text
    • https://kajavowonedefa.weebly.com/uploads/1/3/4/8/134858644/bilidosopuv-lufila-subumineluz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gupojakami/android_go_rom_for_redmi_4a.pdfIn PDF document text
    • http://dunupepemogakiw.epizy.com/free_avery_5160_template_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/box_culvert_design_spreadsheet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/xonikonivotulajeju.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/73325231254.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/ripisotudinaneponuvez.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF9 5032 bytes
SHA-256: 2a9a63e76dc02c362abe47004440960676b3e610d82ad7eef8bc9178754cfcdd
font_01_sfnt_off00013e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E1D 11464 bytes
SHA-256: c82e9bc2bea23a9d11360d2be53d50528d693ed49fa70fcde791bb04877f87e0

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