Malicious PDF — malware analysis report

Static analysis result for SHA-256 05775fdfc4b5ca6b…

MALICIOUS

PDF

67.6 KB Created: 2020-11-09 18:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f0660f3636477c84ca4f8912e699a2f4 SHA-1: d9f54fce4ce2021e7731aefe2c4887074b78751f SHA-256: 05775fdfc4b5ca6b9d75d362a72cd949899d26fd2645c3e14182345afed214c9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which are numerically or generically named, suggesting a link farm for SEO manipulation. One prominent URL, 'https://trafftec.ru/123?keyword=free+robux+no+human+verification+2019', indicates a lure for free Robux, a common tactic in phishing and scam operations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://trafftec.ru/123?keyword=free+robux+no+human+verification+2019 PDF link annotation
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/493bb36e4ef.pdfIn PDF document text
    • https://bonifivudinuf.weebly.com/uploads/1/3/4/3/134305406/bovosilafa_munaxidaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_5f8efc99ca388.pdfIn PDF document text
    • https://jazaxalik.weebly.com/uploads/1/3/4/4/134488577/9955626.pdfIn PDF document text
    • https://tuzigopidimeb.weebly.com/uploads/1/3/4/3/134320631/504aa782d.pdfIn PDF document text
    • https://kileligujet.weebly.com/uploads/1/3/4/4/134457719/3212860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490133/normal_5fa95fd854572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403948/normal_5f9d640d104ad.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/dc97d18b-7b5c-4c28-812f-0f426f09627e/27964419989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb84ee5-c400-4142-bcee-d2654cd52106/17878105698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5875c720-5b53-4e5f-8cdc-225bde11740c/motemagexipidix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3e49ad6-6f2a-486a-9579-a8bf7da8c362/26243004591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13f90569-0152-4fae-a8b6-9c93f04a7454/dolphin_emulator_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c686f83-f52e-4be6-b5b8-ab924edbcf34/pdf_anima_christi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/024595ed-6198-45c2-9b2b-9041813971ef/jisukejilisobeto.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_off0000cadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADB 5616 bytes
SHA-256: f2394cbc4bf111624717c777a552e24dadd205b2c4b6043d04b991c5e4a58e44
font_01_sfnt_off0000dddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDC 10648 bytes
SHA-256: b7b9e8a0de57dc7f8b75e7d27a65581436ae58881ca9d1f70765d39084344aa3

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