Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa3af0e9df98cc8…

MALICIOUS

PDF

66.0 KB Created: 2020-11-23 13:14:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c701b8a6402ae60b01905f174242a1d6 SHA-1: 92f7ddf5500f4caf325f969451672ec08b323376 SHA-256: cfa3af0e9df98cc83cd88ebefa68e248580038e6b248bfc6812b187a47a74b50
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL pointing to 'traffking.ru', which is likely part of a phishing campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

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://traffking.ru/123?utm_term=ispoofer+for+pogo+no+human+verification PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374953/normal_5f8f258c10904.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_5fa01537201cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5fb91f4b84498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374380/normal_5f8ae98dd97b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5f8feabe3513c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_5f9273615be6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_5f9328c21b5ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f8bf9287f448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5f993c57284eb.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/ea3ebb8e-69b0-4035-afeb-a76f3489d5c2/reddit_nuclear_revenge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c563aa9-4538-4b6e-b2de-8dff27742d43/55872385398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12b5708f-615a-4569-99fc-efe67df1f3bc/buwamof.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/corporate_financial_reporting_wikipedia.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/avs_video_editor_android_apk.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
    • https://www.youtube.com/howtotechstudiIn 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_off0000adff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADFF 5396 bytes
SHA-256: 06b7336d916b096e9e6d7c817aa6c59e27667b8b971c507e87357b50cabb4809
font_01_sfnt_off0000c039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC039 10764 bytes
SHA-256: 5ac29cebb5256f075068f9e88bcc3fa0942479766355caf7c3bf3017ec01a6ec
font_02_sfnt_off0000e449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE449 16080 bytes
SHA-256: b118ad4a5f0f66e944d0a6e82a0dad6050c27e77cb1eabf64d07f40874ae21b7

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