Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3ae4c77750f402…

MALICIOUS

PDF

71.3 KB Created: 2020-12-01 03:16:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6bd9df0849c214aef098a1a4db03db99 SHA-1: 525b262b3bbeca490a4dbe66486516ded1cbc839 SHA-256: fe3ae4c77750f40222300bc42a51fe6aabe659a27355304c909a475316668881
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious content. The presence of embedded URLs and the overall structure point towards a phishing or scam campaign designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/strik?utm_term=paidverts+payment+proof PDF link annotation
    • https://fofebufog.weebly.com/uploads/1/3/4/7/134738758/20f30241a8.pdfIn PDF document text
    • https://newogofifexepe.weebly.com/uploads/1/3/4/8/134884114/fovuton.pdfIn PDF document text
    • https://joxiwawetesamiv.weebly.com/uploads/1/3/4/3/134306419/4895753.pdfIn PDF document text
    • https://domalaxugopomi.weebly.com/uploads/1/3/4/6/134606687/mokurajuneliba.pdfIn PDF document text
    • https://paidera.com/?r=11703763In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/formalits_cession_d_actions_socit_anonyme_tunisie.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1c949ee0f32b871c58b4/1606294676823/69029289254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d5b1aeb-692e-452e-b828-c88c0c51e661/92312429440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f49c05c0-6c8e-41d4-97c3-d40eff39b268/poeme_sur_le_mariage_victor_hugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4885e003-6548-4962-a14b-891f6507b4f3/android_billing_library_tutorial.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc136563398ff7515300e75/t/5fc31d21fa04221c71866e75/1606622497759/dc_mongul_feats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06f9283-1999-4fa0-96a9-b8b3cf41b753/87841558968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ea14c27-fae2-42bc-8fdc-69354b83d1d5/dojefuvusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ec02d9-7907-44a1-97ca-acaca0037e46/amit_goswami_livros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc810116-d83a-485d-854a-2b59a20a1165/bachman_and_associates_winnipeg.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_off0000d7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DB 5316 bytes
SHA-256: ddc951012fa3fa2dbd47bcdbca7f9e2f8aefacaf63a99aac53580ecac3cc890a
font_01_sfnt_off0000e9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 11320 bytes
SHA-256: caa48ca2970b0a185814c22386945e303fa26a44c464627a6c366821620b1761

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