Malicious PDF — malware analysis report

Static analysis result for SHA-256 92272b72e56ae9dd…

MALICIOUS

PDF

75.0 KB Created: 2020-12-31 05:30:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 40aa593b8bbf5f084940854a78dc617a SHA-1: 9a85bd76815a7a81091d1de4cd579c0c42b87ee2 SHA-256: 92272b72e56ae9dd5f65d3b61816fda9b0746ef60ca400afc835d4fb2af5f0c6
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 link to a known malicious redirector infrastructure, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The embedded URL, 'https://gettraff.ru/strik?utm_term=happy+fall+yall+long+sleeve+shirt', is the primary indicator of malicious intent. The ML classifier and ClamAV detection further support the malicious nature of this file, suggesting it is a phishing or malware distribution attempt.

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
  • 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/strik?utm_term=happy+fall+yall+long+sleeve+shirt In PDF document text
    • https://ruritetij.weebly.com/uploads/1/3/4/7/134704214/pawemejalazifeli.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/d5chegi/fokixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485942/normal_5fbafcbcaedfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450625/normal_5fba3c50d132a.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/f63Xjhh/silavijaledefirabaxug.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/ladudojupavaluw_tabupewaluximex_befopobudofi_murewujotewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f8ca83d1e1a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_5f8cef5ff1a73.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/dojivewobasuval/burp_suite_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/demography_and_social_statistics.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/bruyeres_debussy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75634fd7-6f21-4183-937e-f1695be9fff6/vidizutopenikumobeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0cbe997-a610-4503-80db-f998ab5a972c/44680416745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dec41b9-043e-4c48-a3a1-f71b24773b61/lasinalo.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/59669590695.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_off0000e74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74D 5288 bytes
SHA-256: 1cd5d690807ce0ada5142267fcc9cbd00bb4f0d287080129197201515902f29f
font_01_sfnt_off0000f957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF957 11232 bytes
SHA-256: 2fb8ff6d3e62391fd6d1f42644c0c5b92ec49acf27d8d4aba417e87e7db10009

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