Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea3e54efa85f681…

MALICIOUS

PDF

74.3 KB Created: 2021-03-06 01:42:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9e602b0d099aeb23e569dfbfa06d0682 SHA-1: f4c8468e974bd25cc7973acd4a7ebff779037cc9 SHA-256: fea3e54efa85f68142d54c24d7caf56413cdc18c59f5746dce35a89241e76c10
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of numerous external links suggests an attempt to drive traffic to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/strik?utm_term=tcp%252Fip+protocol+model PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477864/normal_5fdcdefb4fae6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475219/normal_60248ce6f24c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379841/normal_5ff9fc4846bf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417207/normal_5fe7bc50c67ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_601f038b65b1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477156/normal_601f897ac890c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500692/normal_6012634c2b957.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457604/normal_60080a9cec5e9.pdfIn PDF document text
    • https://gajifawegux.weebly.com/uploads/1/3/4/6/134649352/8229862.pdfIn PDF document text
    • https://nezuvaju.weebly.com/uploads/1/3/0/9/130969963/72c13.pdfIn PDF document text
    • https://nawobelif.weebly.com/uploads/1/3/5/3/135307193/wotiber.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451757/normal_60067f7f6950c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415756/normal_5fe42302d0d62.pdfIn PDF document text
    • https://xegezegev.weebly.com/uploads/1/3/2/6/132683484/629f55053.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501208/normal_5ff16769790ca.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/sowirutelevolur/toxevowitojupemen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9800ecb0-0712-471b-8567-e20db33234cc/89982587403.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/bootstrap_blog_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf64e22-4c6e-42b0-b5dd-85c69354fddb/somagufikegimadejex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8eef33-6ec8-45f5-b590-cfec1a37a763/what_does_bible_say_about_marriage_vows.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/agent_vinod_songs_songspk._pk.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/medoradetugalebuwapirupiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfcfc4ff-03c0-4b9a-aae9-13d710f48ca0/69863303980.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/quiz_questions_theme_tunes.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_off0000e89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89B 4816 bytes
SHA-256: 0e870492d0b84135864083eee2d11b1066d7faa501fdd4091fe676564166ce1e
font_01_sfnt_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 10280 bytes
SHA-256: a1a4ef525a75024832d0b90052a1353828904a5fd504a6a221da90e1f4b49cce

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