Malicious PDF — malware analysis report

Static analysis result for SHA-256 06161993de0bf2de…

MALICIOUS

PDF

81.2 KB Created: 2021-01-02 06:13:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b2b8386834bd4b5c47dd78f9ad604345 SHA-1: e932bb161473774dbabb709e3c6c42991ce5df9c SHA-256: 06161993de0bf2de95ded1e818aa4a431769fd4e965a15ba238f5d16d7d2d7db
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to `https://gettraff.ru/123?utm_term=wind+up+meaning+in+hindi`. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents, likely for SEO manipulation or to host further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=wind+up+meaning+in+hindi In PDF document text
    • https://musuvawe.weebly.com/uploads/1/3/4/5/134528527/312bec1b0f2eab1.pdfIn PDF document text
    • https://cdn.sqhk.co/totudavomud/tJfJxjj/gerivufotokobubagetek.pdfIn PDF document text
    • https://satewode.weebly.com/uploads/1/3/1/4/131407014/05c87bd.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/386b633c.pdfIn PDF document text
    • https://cdn.sqhk.co/zufuxirap/hfhaqib/bumik.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/ajhjXBk/reversi_or_go.pdfIn PDF document text
    • https://vuxojamobepu.weebly.com/uploads/1/3/4/3/134333522/dojuxabef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/bezutu/76331839962.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/affairscloud_weekly_september_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/kutefipavimuvadafuvozu.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/mortal_kombat_9_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/the_contemplated_transaction_en_franais.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/33292705712.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/water_operator_certification_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/62807708150.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC23 3044 bytes
SHA-256: e3e01ecf909335f0b701527293c0a2247a60029f9d2aa37047baa59cca34a430
font_01_sfnt_off0000d702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD702 5080 bytes
SHA-256: c9f6531476cb161b893f3569a1bd48b990e6a7d4961b7a27db6aaffff3e193fa
font_02_sfnt_off0000e830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE830 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_03_sfnt_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 11796 bytes
SHA-256: 47dbee0bcf9232b3f4f6b0999f04dabc72681dd8d0b5a2f067f496b120aecc8b
font_04_sfnt_off00011b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B28 8256 bytes
SHA-256: 0e5f5352996e16272dadcf4eff8055eda1b33ae52bc01f62e6783b95283605cf

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