Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4c1de91876707b…

MALICIOUS

PDF

66.7 KB Created: 2020-11-11 00:56:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4258da59a12b5b828212cc4b0a3ec70f SHA-1: 84df0d662a697ef2a81f4231f920c2f8950263e5 SHA-256: 9d4c1de91876707b3f30aed1dc0fabb3b398dd8553b7e193c599b786c8a7efce
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, with one pointing to a known malicious redirector. The presence of numerous links suggests an attempt to manipulate search engine results or direct users to phishing sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?keyword=duluth+shipping+schedule+august+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387715/normal_5f8de16a99142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370299/normal_5f904c62707fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421366/normal_5fab132e81fb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f8ae64b48177.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/difusalabefe-kisoget.pdfIn PDF document text
    • https://gasodugolulo.weebly.com/uploads/1/3/4/3/134375537/bikutodiv.pdfIn PDF document text
    • https://logukevagas.weebly.com/uploads/1/3/4/5/134507161/juxoroponox.pdfIn PDF document text
    • https://xetasigebe.weebly.com/uploads/1/3/4/4/134443645/3851377.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462976/normal_5fa9e28c027ed.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/fff32d13-f4d8-4159-a484-97455fccb371/medol.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/calendario_de_vacinas_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d0b766a-406b-4f7e-ac28-6d0e452053be/adobe_animate_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a847292f-718d-4a8b-9621-0885028c5c65/sweetbitter_espaol.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_off0000c6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B9 5720 bytes
SHA-256: 4707064ce989c01643b8bfa2d6af641261c281765bf16b58c22169ff2ff41e9f
font_01_sfnt_off0000da36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA36 10620 bytes
SHA-256: b166952b5ecfe22f0a6adba2ee6c1e33ef1c4690be394a9638b68755d81bad52

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