Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5d992e4ba75f86…

MALICIOUS

PDF

76.3 KB Created: 2020-12-15 19:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e2fb95b231e2564dda606e2988db5b25 SHA-1: 79c88f25b73eaa18101fd10e2a1e877a6d600c0a SHA-256: de5d992e4ba75f86dc2585a91fc082a48d9bcd3a076e9f7f20ead545c1277a7d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV and an ML classifier as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffe.ru', which is likely a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious resource, likely for credential harvesting or further malware delivery.

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
  • 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://trafffe.ru/123?utm_term=random+question+generator+deep PDF link annotation
    • https://zafapeniledepur.weebly.com/uploads/1/3/4/8/134846756/joguzegubo_venigekowaf_junakadopezabo_lefubizapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493600/normal_5fbc74d03be09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500201/normal_5fb30317a73ca.pdfIn PDF document text
    • https://rarikomedos.weebly.com/uploads/1/3/4/6/134616559/dazepatoner.pdfIn PDF document text
    • https://muzavixoro.weebly.com/uploads/1/3/4/6/134647253/b8b96bf050da02.pdfIn PDF document text
    • https://burubigek.weebly.com/uploads/1/3/4/8/134884838/7115406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5f8f193d1434e.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/rufonali/absolute_value_worksheets_math_drills.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0f135147b14804fa635e/1606291219893/time_add_command_minecraft.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfdb415687f52b6b7b2913/t/5fc2b918eaf37e3b64f62055/1606596889895/how_to_use_monat_oil_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/roxanet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76C 5380 bytes
SHA-256: 012a7fea91e1f75265d92d11f70d3e38c65fe292f56206800aa3631c318a967a
font_01_sfnt_off0000e9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A0 11348 bytes
SHA-256: 8b39ab5d5728a253505020cf3d5ff214572b3282fdbe283d9b983ee5457737a0
font_02_sfnt_off00010f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F94 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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