Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc06d7f3fe7681d0…

MALICIOUS

PDF

72.6 KB Created: 2020-12-18 05:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cefd7b0174a6a54296583a49ce4987af SHA-1: 90a235420313624682ba9ea6cff3542af2a53f5d SHA-256: bc06d7f3fe7681d020c8684349ea3f1926401df2d8e7218d7bf4ae283b930ef9
154 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. 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 0.9998

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://ggtraff.ru/strik?utm_term=strategic+staffing+3rd+edition+pdf+free In PDF document text
    • https://static.s123-cdn-static.com/uploads/4477916/normal_5fc871be620d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480403/normal_5fb960a41075e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f8c6ba62b181.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409621/normal_5fc5501c59906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423154/normal_5fa5d8c170675.pdfIn PDF document text
    • https://gokewulifas.weebly.com/uploads/1/3/4/5/134599519/39f165ef9206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443362/normal_5fa5c46a5a2cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502246/normal_5fad81b91b9df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389805/normal_5f98a256d779d.pdfIn PDF document text
    • https://sizomejuxitiz.weebly.com/uploads/1/3/4/7/134748976/loliji.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/womirofop/puzikovevidowemijug.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/58589104142.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc294d0bda9c57a97c8e281/t/5fc3f8742dd96f591868f9e5/1606678645667/interesting_parametric_curves.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_off0000c1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E7 5556 bytes
SHA-256: 29609f9a4dd56d1f7ccd8987fe726b711e35e9f1677e9b3cbb4d63619e0a4323
font_01_sfnt_off0000d4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E4 11192 bytes
SHA-256: d737a67ebb51666c6dd817b49a99805e0f4ba7bcdae1d37dd2d0813462c6a70f
font_02_sfnt_off0000fb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB42 17556 bytes
SHA-256: d1cbf4a6d99bad06ed600fe95f114ae4a77561611d6ac517d46937c6798dade3

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