Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c6524be7ed521e…

MALICIOUS

PDF

71.3 KB Created: 2021-05-22 02:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: dff3dd18a727b9813b613d930719264c SHA-1: 1a40fdf38d750a493c2855061431d541ae2ab729 SHA-256: 98c6524be7ed521e51a49d30106801823ecf1fe42ec5538ee87e5408c991f4fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for SEO spam or phishing. One prominent URL, 'https://nipisod.ru/strik?utm_term=how+to+program+remote+for+centurion+gate+motor', is directly linked to the document's apparent purpose of luring users to a malicious site. ClamAV detection and ML classification strongly indicate malicious intent, specifically as a phishing or trojan delivery mechanism.

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://nipisod.ru/strik?utm_term=how+to+program+remote+for+centurion+gate+motor PDF link annotation
    • https://bemixujigimo.weebly.com/uploads/1/3/0/9/130969474/3ad38df9d4.pdfIn PDF document text
    • https://burakatotofok.weebly.com/uploads/1/3/1/8/131871829/xopaxafefegedonob.pdfIn PDF document text
    • https://gigufeti.weebly.com/uploads/1/3/4/6/134633464/mizovatixalerav-niruronunebu-surig.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
    • https://s3.amazonaws.com/fojaxexino/81604477615.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/nosipavimugajapi.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/tujomipewonegawawo.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/zivikotalis.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/mr._coffee_mug_warmer_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/letter_of_recommendation_for_residency_template.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/77620054512.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/jefumofage.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/40308596814.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/48113052215.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/6053210922.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/rutefubuvabukawukide.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/afrocentric_social_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/punebexojunomufipapuvine.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/fojixiwabesawonewirog.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_off0000d0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C6 5060 bytes
SHA-256: ad6bb416d134324803b9eceda734c1dce2f23c21ab91c0b1e38af64930dbbb8a
font_01_sfnt_off0000e1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F6 9304 bytes
SHA-256: 7a6e8b8206ddfcbeb6a8e45ec253d72744c66388891d876ee53fd9264595574f
font_02_sfnt_off000101d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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