Malicious PDF — malware analysis report

Static analysis result for SHA-256 65140698c14ee32d…

MALICIOUS

PDF

93.2 KB Created: 2021-06-08 03:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 96538f2c8235fafd6b72325b33560398 SHA-1: b099a1cd6f24a63344bde03ad2053bd05964ecb2 SHA-256: 65140698c14ee32d9e7036fa45ce9385ae52602bc3836cfa656456b5ade656cb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=sausd+mandated+reporting PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367621/normal_5ff1152ea8f4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5fd3d63c3b9c2.pdfIn PDF document text
    • https://dizalojowu.weebly.com/uploads/1/3/4/8/134866254/2999437.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484093/normal_5fe2253e2c05e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471252/normal_60624a34022e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452846/normal_5ff3d7eae84da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_6050aa43513bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415518/normal_5fff9724cc046.pdfIn PDF document text
    • https://fozogefijegajor.weebly.com/uploads/1/3/1/4/131453134/6254673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454825/normal_604700e4c66ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374696/normal_5ffed22d4f48b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414161/normal_603040920da6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376126/normal_5fefe5d042768.pdfIn PDF document text
    • https://pewaruraxifazof.weebly.com/uploads/1/3/4/3/134340131/1797851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416514/normal_6046665db935c.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/46afd9f0-fd0c-481c-bb19-cd4b866aacc8/46187534623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15612b47-4eb1-4256-a1c5-7a4203683be1/does_a_keurig_2.0_come_with_a_water_filter.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_off00012d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D74 5348 bytes
SHA-256: 07d32629b93e0f1cf5412f739bd4a0b4612438db08659303d9d28dc064a9c497
font_01_sfnt_off00013f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F88 11748 bytes
SHA-256: 9e4a3f6e30628d900263062324afd1777591c715d680991b276263443af6a120

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