Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0a54c1100a40e6…

MALICIOUS

PDF

69.4 KB Created: 2021-02-22 06:01:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: da0ddc0ca1c16036959629dd90917d25 SHA-1: 570c2c1858c249adf84873e131004e78543d2646 SHA-256: 8b0a54c1100a40e61acc6ed13e4dcb342cce5bac81c53f8d51807d3709c1abfc
156 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 0.9998

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 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.
  • 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://baarspo.ru/strik?utm_term=c%25C3%25A1lculo+diferencial+e+integral+ingles PDF link annotation
    • http://meine-gebuhrenfrei.com/muzutthsx2.pdfIn PDF document text
    • https://dujolisinapujis.weebly.com/uploads/1/3/4/3/134328324/fufikexomediwefavo.pdfIn PDF document text
    • http://fortuneocredit.com/canon_in_d_piano_sheet_music_freerww0o.pdfIn PDF document text
    • http://the-job.ru/95895955694ykzv0.pdfIn PDF document text
    • http://feyakast.online/71029793467t01a6.pdfIn PDF document text
    • http://robinmani.site/26177003750pc3fy.pdfIn PDF document text
    • http://nickned.me/99305214838vb0se.pdfIn PDF document text
    • http://fit-italy.space/silewmy8g9.pdfIn PDF document text
    • http://gobigs.space/fpsc_challan_form_20200s6mt.pdfIn PDF document text
    • https://kozivusetusi.weebly.com/uploads/1/3/4/2/134234967/6096433.pdfIn PDF document text
    • http://affilateapp.online/dark_angels_3rd_edition_codex54pdp.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/widuxade/microstrategy_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/sadogajusunajumuwasuse.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/60738882720.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/niromajija.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/hernia_diafragmatica_congenita_2014.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_off0000d08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08B 5328 bytes
SHA-256: f38bfd91850dcbb8ba782cfb2025db53651be0c2eb7864808236438422b02694
font_01_sfnt_off0000e228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE228 10768 bytes
SHA-256: d19d8c0d3150e98cd2552529248a713051d934178c9ec054a6cfb72359e75dad

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