Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4f6a2d995153aa…

MALICIOUS

PDF

72.2 KB Created: 2020-12-13 14:03:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 18399adfbed994a3410422a4910093dc SHA-1: ddd1a0b2143e479e2fba3002e1de2ad83b6257b9 SHA-256: 9c4f6a2d995153aac1fc5b842a718332ee3f66484e5c8bc242a1e9e825df8e64
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=vietnamese+pickled+carrots+and+cucumber PDF link annotation
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/e54ee.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/judinozipu-podijezes-nizatazadigesud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/baa45834-f7d1-4f31-bb7a-37f4e7e85f86/24646641043.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/sifox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23999236-7c4b-49d6-85b5-f07a0e8c6aaf/56907720496.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/gagovatini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13f58f7f-6e91-48ac-ae68-1e7b11765fb3/niwekusuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/38227185460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/944af5ae-4863-4034-ac8b-b6f2c13c3100/white_mountain_lions.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/o_que__lixo_organico.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/the_real_latin_bass_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5fbc2d2-5543-4583-8ca5-689a77257fa4/20702790184.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/template_cv_adobe_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/holistic_and_team_approach_in_healthcare.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/12099096825.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 2

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_off0000dcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 5388 bytes
SHA-256: 7b04d520c1435a39ea7cc61432212f17eba120f73b487361f0c3c7cdb7db73c9
font_01_sfnt_off0000ef29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF29 10840 bytes
SHA-256: 2711944cc95bd12cfa6912f9ee0a631d930d8f8e66bfcc372fd349981bcafb58

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