Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d535b92723ab6e…

MALICIOUS

PDF

65.2 KB Created: 2020-12-27 15:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 18f984a69d830809b7e94f588a9a61b6 SHA-1: b58d5d651d9884bf302c6d0076561e78c1f76b61 SHA-256: e1d535b92723ab6ec9718775d4fcf3740d8b2e1ddff1875bfd85686bbf92af0e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm. One of the primary URLs, 'https://traffset.ru/aws?utm_term=cadillac+and+dinosaurs+hack+apk', suggests a lure related to hacking or potentially malicious software. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

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://traffset.ru/aws?utm_term=cadillac+and+dinosaurs+hack+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444866/normal_5fb041a78e13a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447273/normal_5fa11d75a8788.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/aqkhfhi/depofiva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483839/normal_5fe40c6321fb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405195/normal_5fc152eff33ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_5fbb3ab84839e.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/4258236.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/1lskgjN/flying_monkey_beer_kansas_city.pdfIn PDF document text
    • https://dupagerenukuxat.weebly.com/uploads/1/3/4/7/134751723/pelosofatawolavaw.pdfIn PDF document text
    • https://jasebezaf.weebly.com/uploads/1/3/4/6/134630561/mokupaxite.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/wavaduluwawajoramitu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f8fd608b7c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445557/normal_5faf9fdb5284b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_5fb8d25f4dafa.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C7 3588 bytes
SHA-256: 58aa2c624d9c4494114897d0fa7984dff5b0aae519774e4ebb17e8753c983264
font_01_sfnt_off0000c285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC285 5132 bytes
SHA-256: 5f7b2e9b8f7c5214d3ca1a39faf81f29a0019614edb05544a3da53550ba07af3
font_02_sfnt_off0000d3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EB 10380 bytes
SHA-256: c2a14e0202e83492a2bacf8c64e692cf49787a1911de8feadcedd7296a1163d7

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