Malicious PDF — malware analysis report

Static analysis result for SHA-256 67008fd4ce70975c…

MALICIOUS

PDF

76.0 KB Created: 2021-05-28 23:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 03c1387dd2aec5b0702a30de8c1eec92 SHA-1: 68e2acbcde2a89df88ded95c22d2786f411d0a6f SHA-256: 67008fd4ce70975c94ac9560a4458a4597f69c252bb8d72001cabade81f83ffc
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/123?utm_term=minecraft+xbox+360+maps++usb PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421464/normal_603f8ecf41aa1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_601ed14a2975d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424405/normal_5feeb1186a2f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494874/normal_6056e7f83326a.pdfIn PDF document text
    • https://wigemixez.weebly.com/uploads/1/3/4/2/134265991/d22d6cbd.pdfIn PDF document text
    • https://morinuzarisifuf.weebly.com/uploads/1/3/4/2/134234593/pagarugojit-lipolovonalo.pdfIn PDF document text
    • https://lunipudazu.weebly.com/uploads/1/3/4/4/134462877/58c7ffe8b2be94f.pdfIn PDF document text
    • https://sepanafawo.weebly.com/uploads/1/3/4/3/134316973/2914634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501233/normal_602f26d094237.pdfIn PDF document text
    • https://raxasowofano.weebly.com/uploads/1/3/2/6/132681821/vutered-xebugesuja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375907/normal_60551dc537452.pdfIn PDF document text
    • https://moninedowilex.weebly.com/uploads/1/3/1/4/131436981/gotifinax-nemowovusiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_600b347acf9a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469106/normal_5fd92a7e003eb.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/ecb1461a-d1d4-4e91-833d-37702f86a728/rupibesumasadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81b3ce7b-bfde-40c4-9ca7-f851b4644dff/gta_san_andreas_superman_mod_free_download_highly_compressed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad7baec4-6a00-4ccd-91d7-4f9a7a7b2a65/japojera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c701e26a-0f86-47d8-8427-9301d67d8f0d/47520450872.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_off0000e967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE967 5804 bytes
SHA-256: 62d670a2a195abbcb13c0b92b536556f657a34af334b6d921aaeddb7da9113db
font_01_sfnt_off0000fd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD17 10724 bytes
SHA-256: b2326592ae7d882f7e7faa34ad2ec1e8974cfd5e004822d770fe8f4ce368f09b

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