Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14dbee8bfd34afd…

MALICIOUS

PDF

74.7 KB Created: 2021-06-03 08:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5db47a77248fa39d2d14343dc5bf8f96 SHA-1: cd3c72654e1b8510a0f931c53a9b365dddf6947f SHA-256: d14dbee8bfd34afd7f421d0fe2b7e41ac3bd8d320c70a86b672c2a6a60f43524
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link T1059.007 JavaScript

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The 'SE_CLICKFIX' heuristic indicates the document likely instructs users to execute commands or open links directly, bypassing typical macro security. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://irlanc.ru/pbw?utm_term=how+to+install+memory+card+ps+vita PDF link annotation
    • https://kujuxase.weebly.com/uploads/1/3/4/5/134584075/xawuvukavexuwuv.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4381738/normal_60b5e99064606.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470972/normal_5fee9b12a9c99.pdfIn PDF document text
    • https://zebepinexorusog.weebly.com/uploads/1/3/2/6/132695607/jixasijifutena.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413838/normal_5fca6d34711c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5fd33fd0826de.pdfIn PDF document text
    • https://bizekexejanagiv.weebly.com/uploads/1/3/4/5/134593847/95f106e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461201/normal_605327740a7d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422658/normal_602c57d6a0d0d.pdfIn PDF document text
    • https://kepowawovexe.weebly.com/uploads/1/3/4/0/134016687/3967881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389108/normal_600dcdbad41c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463788/normal_601b03b7aa368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444885/normal_60669c1d9f3ae.pdfIn PDF document text
    • https://defifipak.weebly.com/uploads/1/3/4/4/134442047/2451848.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461766/normal_5fc9d7897e7c6.pdfIn PDF document text
    • https://lizoxezubim.weebly.com/uploads/1/3/0/7/130776499/2206411.pdfIn PDF document text
    • https://puwaxitakobesod.weebly.com/uploads/1/3/4/1/134109073/pezot.pdfIn PDF document text
    • https://vogoworelo.weebly.com/uploads/1/3/4/2/134266182/3741128.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/28d2325f-0a81-4bb4-8198-770bbe28338e/nidotixulefefopoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c2ed964-0a84-4c97-b173-34a731c2b602/8759532477.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_off0000e555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE555 5432 bytes
SHA-256: 9e9c537175c414bce2d57faea8259cb1050fde0f17a7075098bcfa7e9fcd5658
font_01_sfnt_off0000f7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D1 11072 bytes
SHA-256: 34a26392c2909d8e140d5d2e3cf1747b726cd3d22c4ea302180ccee0c98898dc