Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad65b5d60e32f9a1…

MALICIOUS

PDF

83.0 KB Created: 2021-01-06 20:01:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6a8c5c789df0743773014475779c7071 SHA-1: 790317aab1cbe99e907f9d1e9a812774225d3936 SHA-256: ad65b5d60e32f9a11ff880d7ef0bed5d0cac5a5119a2546d5655eb54387152e9
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to a redirector that likely serves further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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.
  • 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=php+error+reporting+display+all In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5f970a632d4d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371806/normal_5fe07fe22cd5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381759/normal_5f9af59a98bf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478932/normal_5feb351ce3291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392652/normal_5fda3d5ebdb96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449793/normal_5fbd1b88734c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491155/normal_5fb267afcd60b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496577/normal_5fe674b58495f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417140/normal_5fed925c1edd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_5f9fe37471c78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459028/normal_5fa7cdf9c1225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418583/normal_5fd807e1e2eb5.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/b23b16e9-6daa-4938-b28d-ececff994cb9/fewewijujitimurinaxipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58699ecb-294d-4912-859c-083c1b1cb550/sikalokoziw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b396577-0166-4c1e-8033-abf26854ba4a/11668768719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6339aa9f-3226-4836-a86a-065561e05984/98908026265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ca80246-f3f2-4707-a22f-42fb53b0c8a4/traditional_thai_massage_techniques_full_body.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_off00010331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10331 5324 bytes
SHA-256: 2f56f80ed19e296781a7729b9b14095368376ca2c82ec224c59eca0388f9b688
font_01_sfnt_off0001154f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154F 12136 bytes
SHA-256: 2cd547bf7ccac77d35926eb7a1706eabd7220e3db747ee31e026ef04486b1ac6

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