Malicious PDF — malware analysis report

Static analysis result for SHA-256 63cc19ee6b5051ab…

MALICIOUS

PDF

47.6 KB Created: 2020-11-06 06:14:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d21332a32e0f515f903f425adfbc60e1 SHA-1: d2d9869007288d8f4da96198a31f88113988f2e8 SHA-256: 63cc19ee6b5051abd8204f10afffe96a457c172a69853b1067ecb4479158fbb2
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as part of an 'installation manual' lure. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic suggests a link farm intended for SEO manipulation or distributing malicious content. While no scripts were explicitly extracted, the presence of numerous external URLs points to a likely distribution or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffine.ru/123?keyword=jgbs66rekss+range+installation+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376354/normal_5f89b7528dafc.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/2691997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388596/normal_5fa189c9776b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374700/normal_5f8aeb71e4782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_5f908faad639b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5f96c6411ab95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408596/normal_5f9cb4248f89d.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/62830dd6-8447-493d-aed4-dd887e5ee995/37267299039.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/bodapupalariwavevuweseg.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/zuguwipavusoxazeba.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/69140260889.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_off00007af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF0 5352 bytes
SHA-256: d7ac5ec46ee6153513bd6527e4f6a7c669dedbff4ec2657eaa259574891439f5
font_01_sfnt_off00008d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D13 10904 bytes
SHA-256: d41927e30f16e0e2db130e5aecaa41c02d7ae52e88fddfd66f9499fb9b952233