Malicious PDF — malware analysis report

Static analysis result for SHA-256 1282a61734087a65…

MALICIOUS

PDF

72.7 KB Created: 2020-11-18 08:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 01f1febdcb9ee55af66d84eedddce354 SHA-1: 1cc1cf46011b67e00cd6343238659ceef89e75c1 SHA-256: 1282a61734087a653e8029087005bd0ccaa920e8e02f2368f01a5c26d5263d48
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'traffnew.ru' was extracted, suggesting the document's purpose is to redirect users to a potentially harmful site. The document body contains obfuscated text and metadata related to wkhtmltopdf, but the primary threat appears to be the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffnew.ru/123?utm_term=that%2527d+be+great+meme PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f874929774cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5fa331ebe0fcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481820/normal_5faffaa676bee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_5f9b07bd8b245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459176/normal_5fa4ce5b3248c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5f8a19f2d9ca5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419826/normal_5fa024deca8df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f8bf4aeeee05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5f9f103de7ccc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/16e3a57e-a1ff-4912-9b3f-b7e6f06886dc/major_religions_of_panama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19747d72-736d-4db2-addb-9d9e6b50f953/dhating_naach_mp3_song_download_320kbps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda47c45-3ae4-49cc-8e5c-03832d661573/pukerutadut.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/siligizunuzerejit.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/classroom_objects_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ff6585f-55e0-40c9-a7d8-8532bc88e208/91986634460.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CB 4676 bytes
SHA-256: 9394dc712f6bdcb324c1e60386497b597ae888df2061a2dd334a5264d41f2a6a
font_01_sfnt_off0000e3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B3 10648 bytes
SHA-256: de1670ba2c5526cabc32166e3269da2d612c6b5bdd813a5ff9dbf7b6806cd89e
font_02_sfnt_off00010803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10803 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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