Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c9dc52aed60a3ca…

MALICIOUS

PDF

63.2 KB Created: 2020-11-20 04:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e42a62064acad5b33ab92aae6df3af90 SHA-1: 989ca9c09b2b184d950858d007533870a53b25f5 SHA-256: 9c9dc52aed60a3ca5bb0c10adcc37ba5ffd06b85b7f5eced3ff9fa3c4264cf8c
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-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://trafficel.ru/123?utm_term=shadow+hills+high+school+phone+number PDF link annotation
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/dopulikowowazatise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5fb50ce58487b.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/b52c7ffc1e01f.pdfIn PDF document text
    • https://belafawejogawol.weebly.com/uploads/1/3/4/5/134583754/9074411.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/digigitusuduk/palobudu.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/mubovuxadugufiri.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/speaking_english_course_book.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/50s_sock_hop_food.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/86948574011.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/putlocker_harry_potter_2.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/viziw.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/61496532586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04208ee6-e111-478f-873a-4af81ec541ee/91147308153.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_off0000ba88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA88 5824 bytes
SHA-256: 4c1c4eb8d4257d1fa2bc5f8631ff683ee01b962874898986dc9a59b88931f9fc
font_01_sfnt_off0000ce38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE38 9876 bytes
SHA-256: bb68a2333f44db30b73e77dea74eb0a93d7046900f7dcfda04022bc9185e458f