Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdea41df602ebee6…

MALICIOUS

PDF

77.3 KB Created: 2021-05-19 16:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: db6a27f6828294f56cbfd2ff393bda9e SHA-1: ae4f5f9a2f480a831eebd545ed572e5497a6a8a9 SHA-256: bdea41df602ebee65e23d551ecb1e314f8e881c7ba4374ceedc59c72dd238055
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 0.9997

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
  • 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://seumenha.ru/strik?utm_term=what+does+the+name+agastya+mean PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444092/normal_603874ef0fa2c.pdfIn PDF document text
    • https://fegikunula.weebly.com/uploads/1/3/4/4/134482285/mirotoro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366655/normal_5fdfa085e2bdd.pdfIn PDF document text
    • https://rupedotumimeto.weebly.com/uploads/1/3/1/4/131482941/piwep-zoputita-wixafelab-memiludin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500183/normal_5ffe4356f101d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408586/normal_603c1c92a901b.pdfIn PDF document text
    • https://relogeseji.weebly.com/uploads/1/3/0/7/130739887/bizilupajejis-lajafezanaweju-jarol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426416/normal_5fe789331e338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408174/normal_606a408894af7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_6046a9393532a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473410/normal_5ff97ba515366.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_601d5d1a746b3.pdfIn PDF document text
    • https://vawosikajoj.weebly.com/uploads/1/3/1/4/131438279/3588473.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5ff5e04330358.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490371/normal_5fedfce9c10ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_6030df815547f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470833/normal_606e67ac56d99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413363/normal_600b4f9163501.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368777/normal_5ff1486dbad4a.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/0f58d09a-f6c6-4d79-9854-a988e3941c1c/nusisuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/020b4713-1f68-4bdb-a034-7899d44a960f/24710830671.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_off0000ee94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE94 5224 bytes
SHA-256: b1c648abf28276b7a56b789cec0aae0cb08dcc0c7313e883eb7999b5cd347e3b
font_01_sfnt_off00010047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10047 12596 bytes
SHA-256: 563cfaf0d36c36a541b841a9cc028fec0ee0d7013407d13b55d9fe2dd6e9997d

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