Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23b5213c2b53e1c…

MALICIOUS

PDF

71.5 KB Created: 2021-01-06 11:20:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 52f8156736837e697ba1e54e74e2fc74 SHA-1: d4a3d041e6721e5ca478b8273b4bc8d823456456 SHA-256: e23b5213c2b53e1ce6a9b5a4e3658e3f5c51dcb7fdea41f836c36ca24539a2e2
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=platform+sneakers+trend+2019'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. While no scripts were explicitly extracted, the nature of PDF redirects often involves embedded JavaScript to facilitate the redirection, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://gettraff.ru/aws?utm_term=platform+sneakers+trend+2019 In PDF document text
    • https://cdn.sqhk.co/gejixoneku/cQaggjh/fm_jazz_radio_stations_sydney.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5f91c485865d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422137/normal_5fa152dd6e3c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pogolo/tegajivapowilozonenujiwob.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/kisagudowafodajexidosirel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/164fa9e6-9512-455f-8b0e-88f5e3454dd8/nerajopabid.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/17308933828.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/kosodejufez.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/14003868847.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/89938200205.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/apache_poi_read_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/51474822088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31a62fa5-c62b-4984-873b-42b05a5070c1/bikamuzot.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_off0000da3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3A 5600 bytes
SHA-256: 7461851074cda8279db527398f01e410e23b753ba48afaee73be3c6a9ca503e2
font_01_sfnt_off0000ed31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED31 10792 bytes
SHA-256: 7182f488f472255ff2ff56e85a531039a95751faa6540456d477dad4893b9fa5

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