Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb7f3e48ada32c0…

MALICIOUS

PDF

74.0 KB Created: 2020-11-13 07:52:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9db756022d8a0bfbd12c4abcf1fb2e0d SHA-1: 42c4339cd09b458688257a00ca99da524c68e1f7 SHA-256: ebb7f3e48ada32c068e2ab0b92232f0b111ba990539ff8c806e55f730b5f4fef
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly and S3-hosted PDF files, indicative of a link farm or phishing operation. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, suggesting the document's purpose is to drive traffic to these external resources. The presence of 'SE_PASSWORD_ARCHIVE_LURE' suggests a potential secondary payload delivery mechanism, though no explicit password instructions were found in the extracted document body. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://trafffe.ru/aws?utm_term=kindle+app+android+sd+card PDF link annotation
    • https://diwapexag.weebly.com/uploads/1/3/4/4/134484560/1748187.pdfIn PDF document text
    • https://gawubodukajine.weebly.com/uploads/1/3/0/9/130969599/velejobage_magudido_dawede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_5f971196ecdf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416304/normal_5f95f113e6841.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414500/normal_5f9cfd9e3f7cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409814/normal_5fa88e1a648ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403540/normal_5fa238fdf37d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417807/normal_5f9ca20c6fc4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481527/normal_5fada519bc004.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/godewumazek/special_senses_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/rolaxivezujixasotufakat.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/97016776071.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/60503161064.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/wwe_maps_minecraft_pc.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_off0000e2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E7 5036 bytes
SHA-256: 0afc2c990f22cb95a4515ed7084126e436a23d7759e340a3c52f6eda73b8197b
font_01_sfnt_off0000f41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41B 11588 bytes
SHA-256: 4cbcf909545913c9f53688c1584961824e3650f2b21a5707d570eb79b1acef2a

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