Malicious PDF — malware analysis report

Static analysis result for SHA-256 27560a02e2e7ee8c…

MALICIOUS

PDF

73.5 KB Created: 2020-11-11 10:05:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0f16a505043b29b3a0b46dc98408e5ec SHA-1: 95bc088225468fd1283ffa471f6765ad35855d52 SHA-256: 27560a02e2e7ee8cb7204d2da583c7d2a5ae7a2591532939afa5d7a243213127
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/strik?keyword=games+4+school+friv PDF link annotation
    • https://tebefatudu.weebly.com/uploads/1/3/4/3/134329870/e4acdb0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f91423ae7381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385422/normal_5f8ee25f1c305.pdfIn PDF document text
    • https://jabezenenadako.weebly.com/uploads/1/3/4/2/134234778/wigivefunosasisuxep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419205/normal_5faa60eacc9b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383802/normal_5f9a6b6523075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f98f62548b79.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/b5192be5-d8da-4aea-a10b-859f92340c91/30471960737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60aa0407-8330-40c5-8545-0fc3d375f110/6032460973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cfe8c78-90ab-4284-9b15-46e86512f6be/cedar_rapids_kennedy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdc84430-b03e-4626-bb78-1b50679e6f97/stoichiometry_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d15253f-ae9a-4bec-a946-9a8a00e70d10/buvamox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9d2ea02-afaf-47b7-863a-3536d93b6081/dixisaremipulemaz.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_off0000cab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB3 5300 bytes
SHA-256: 124b44637903064047516533451d351242ae54997393bcbd733cd3d57ec81978
font_01_sfnt_off0000dca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA4 11568 bytes
SHA-256: 112a1751c260151887ac343aa5f59a3068eb15e9b4f8e523930c9ffee0de2318
font_02_sfnt_off00010428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10428 16160 bytes
SHA-256: 71fec8a3adfe41455811528c654ef740a0d97889ddd19e39e153b04b7507b7f0

Open this report in the interactive analyzer, or submit your own file for analysis.