Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc1cb726459d3cfa…

MALICIOUS

PDF

82.9 KB Created: 2020-11-10 05:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bad002e29c797d67f5136910ce6e410c SHA-1: 11b5da7faf821c0f7c09b601b4336e649a041d9e SHA-256: dc1cb726459d3cfad69aeb570663675fe5b267f647042d97909a5c44a387bdd3
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant heuristic firing indicating a link farm designed to host other PDFs. One of the embedded URLs, 'https://trafffi.ru/123?keyword=example+of+personal+income+statement', suggests a potential phishing lure related to financial statements. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/123?keyword=example+of+personal+income+statement PDF link annotation
    • https://femevidawivuk.weebly.com/uploads/1/3/1/0/131071063/tofowisif.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/tizupujalunawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f889be6a7edc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f8750ddd2e74.pdfIn PDF document text
    • https://kifugezob.weebly.com/uploads/1/3/4/5/134529667/kuziwukozetunanem.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/c9f7b5b1-2916-443c-b4e1-6787b6f95cdb/20973828567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/146356bc-0ab5-4ed7-980d-b38c6e71ff09/pijutorigorix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd62e82c-e6e5-47ec-95c0-09b9efab4a29/runaselurutukupore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3750683b-34aa-4058-a530-5790bb4c78ac/55392572905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b812548-8b15-4a62-a5dc-905b875cce79/69486084656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f2129d-38f2-42d3-b339-973841a2b0e0/57441219361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b2ac7a-995d-4bdb-837d-b0d96a65dab9/c_band_satellite_dish_installation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa23fb47-0da7-47b3-8914-892501fd5def/occurrence_span_code_73.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_off000106e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E2 5184 bytes
SHA-256: 52ca072ee34e5c3ec48c8edd683052622bc57121659422068c22dcc9ddc68b64
font_01_sfnt_off0001187a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187A 11548 bytes
SHA-256: 8546e502e7a4d89fc1296be7e77682ae08c871cf5c57e945f32590218c00fca2

Open this report in the interactive analyzer, or submit your own file for analysis.