Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4daf69f45e3f8d3…

MALICIOUS

PDF

28.0 KB Created: 2020-05-28 00:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 007570254ff1df3c1774278cbcfe6024 SHA-1: 2de1016f4649a482b76c828047d44720e712a894 SHA-256: f4daf69f45e3f8d33966134f1d80710604b49689d82709bcd2997855c7b2f9b6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous external links, masquerading as a Comcast x1 manual. The PDF_SEO_LINK_FARM heuristic indicates a large number of generated links pointing to various domains, suggesting a link farm or redirection scheme. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this document. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://webdisk.themodestshoptx.com/uploads/1/3/0/5/130588988/130588988.html#comcast+x1+manual PDF link annotation
    • http://uf-str-marineconservation.com/uploads/1/3/0/7/130740065/8131374.pdfIn PDF document text
    • http://bregratis.com/uploads/1/3/0/7/130738484/vatazugo_zakosot_sobafisekegur.pdfIn PDF document text
    • http://emilybrobeck.com/uploads/1/3/0/2/130289719/jezezirikupopez_nasibem.pdfIn PDF document text
    • http://1de.undesirable.us/uploads/1/3/0/7/130775570/3072547.pdfIn PDF document text
    • http://decorplaster.com/uploads/1/3/1/8/131871883/4744825.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
🗂 Part of campaign: emilybrobeck.com 3 samples

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000447a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x447A 9832 bytes
SHA-256: 9e538262c86620a2ab8d6e1766e7ad6e6e4e7e191e4138aed8955251e94b5102

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