Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3893aede4f7185…

MALICIOUS

PDF

70.8 KB Created: 2020-11-09 22:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3aabdbf6555eab77657d0b0b2b3e9414 SHA-1: d2e08040189370f5d891c511b4291835433cf761 SHA-256: fb3893aede4f71851f9b65a99c56ce66e7a7b005b1392c248fb4a319d6121c57
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-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://traffking.ru/123?keyword=annie+musical+full+script+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414867/normal_5fa0ba6950a8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5f96c403e5caf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427103/normal_5f9e2488430ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5f9639244092d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_5fa0c889892c6.pdfIn PDF document text
    • https://duxawedi.weebly.com/uploads/1/3/4/4/134477895/7012494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393033/normal_5f9af0a61875b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5f8c61bbde3c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409798/normal_5fa6ac4b13459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426549/normal_5fa61c11c9636.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/wibadinavosunom/cse_100_cao.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/46703077602.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/the_beebo_brinker_chronicles.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/bsa_letter_of_ambition_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/walumegazarikavugurovof.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/39042861174.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/putagiwimixelexawesit.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_off0000cc44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC44 5060 bytes
SHA-256: 9409702aeb817c704d84c3608f1606c8b697f1127827aeb9b0d05c5edf2c651f
font_01_sfnt_off0000dd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD53 10196 bytes
SHA-256: a56193b1bf6c098ad6665d98519ee3f64f94918ae814f34fbd272e3e3aa54870
font_02_sfnt_off00010032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10032 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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