Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f02500f365ce39a…

MALICIOUS

PDF

64.5 KB Created: 2020-11-16 12:58:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c2e99da21039be7f395f649c9a4e666e SHA-1: 9cf22b3a743f7a3475d93f09d9909c7732df6119 SHA-256: 1f02500f365ce39a19f936be60012f71ea836ccab02bbd838e2fa62ac7647b11
162 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. It uses an urgency-based lure. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/123?utm_term=brain+plus+iq+sachets In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387240/normal_5f9149d7c97db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8736cae85b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406166/normal_5f9e21ec93a1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426556/normal_5fab950a7bd4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403679/normal_5f94bf8bbe9fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367296/normal_5f8a51472bb56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385422/normal_5f8eb1a3760ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5fa4ea55aad70.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/7f2759b2-6842-42a3-9490-fb87a4044700/a_more_beautiful_and_terrible_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b88cb008-ed35-47bb-b5b6-f91be9f9d9c8/75333377864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a379aa-c006-4b2b-a028-a84e5bd00557/58412875770.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_off0000be10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE10 5196 bytes
SHA-256: 1919d07d9717686b58a409dfa68811665e1e7f0ea705cc9d413b70f8bb365a48
font_01_sfnt_off0000cfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB9 11224 bytes
SHA-256: 0075e093e499bae6a0afbe28a65bfe6ec32bbbf65179ffe5d3f8df84ce9a553b

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