Malicious PDF — malware analysis report

Static analysis result for SHA-256 e105f5dce04e41ac…

MALICIOUS

PDF

74.5 KB Created: 2020-12-26 01:36:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 35d517c10ed6beb9fcfd5538d2a70a67 SHA-1: feddc3ddc5942067ceac6ead78d23634fa61a197 SHA-256: e105f5dce04e41ac80dfd8f7f7842efc3bac4ebb3f88f80ca2b26b23adfdc6d4
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious link, 'https://ggtraff.ru/aws?utm_term=new+albums+song+2018', is flagged as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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?utm_term=new+albums+song+2018 In PDF document text
    • https://cdn.sqhk.co/xupotuferu/hefhhm0/gojosadixo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369493/normal_5fe5103a15bdf.pdfIn PDF document text
    • https://mapizijef.weebly.com/uploads/1/3/4/4/134493838/tabujogemubew_fupijidiva_kimosimifutinu_gunewe.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/f1252cc6-6802-49a3-9fd2-d1e396686b37/84881089685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01bf28a7-397d-4bbb-a033-3e43ed712bf2/wexopedipoliter.pdfIn PDF document text
    • https://s3.amazonaws.com/welutizenop/rate_my_professor_cua.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/745b986a-9a51-4173-9a9b-115994c6fa96/derowizuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85ac8ceb-b435-437d-a5a6-84b1a31772ed/wapaxetizitodopovila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74dc2fe6-7bcc-4689-9e8b-885e473594db/51288902688.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_off0000e3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B0 5628 bytes
SHA-256: f41531d469157142a621f84771bf3e9de1aba0bdaf2aee77cbac8e5323404dfa
font_01_sfnt_off0000f6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E8 12072 bytes
SHA-256: 794ff08eb8bcf71ada8cb3069623ac7d449a3254d4f1ab97466c334758ce64ad

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