Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd9fee24ede8eb79…

MALICIOUS

PDF

68.7 KB Created: 2021-03-08 01:06:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e7f8c1ff7e4031c11c40017a1562f2c4 SHA-1: 63100c2a3b949cf7142bf34c1874a2a04a6def41 SHA-256: bd9fee24ede8eb79e869a7de8c09f74a18945ff6021472e42b66ff700aaa4b7c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary link pointing to a URL that mimics a search result. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards malicious intent, likely for phishing or redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=porter+cable+scroll+saw+blade+change PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479710/normal_5fd5ffbf67d3e.pdfIn PDF document text
    • https://karinerojefemof.weebly.com/uploads/1/3/0/7/130775135/30b747c731595.pdfIn PDF document text
    • https://bafibosu.weebly.com/uploads/1/3/0/7/130738803/verajelulisufuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_60450712ca533.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/6006cb71-d3c8-4f80-98e3-a8b821bb86a6/sarebavikama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4139344d-cbb1-4171-add8-d8c583766e95/what_is_your_philosophy_in_life_tagalog.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/43876359933.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/jobsplus_malta_cv_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/islamic_history_of_spain_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/romeo__juliet_film_review.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/nomapolurotitisugiwoke.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/carinosa_music_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/xitib.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/angular_templateurl_webpack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5afb93d-dfd2-40e4-b588-b6f9ca2ef469/laxufevusagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2090e344-ee31-4935-a58e-db17b7a3b1c3/rabuxolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b5e8ee6-6c88-4d96-bb46-d9ea47745f8b/zadotifuvujamuwumavaweb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ed199b4-610a-4a28-b2c4-ba6c175ded94/tuxuwatowepenamafugizasi.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_off0000cfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEA 5436 bytes
SHA-256: d3f9ce3cc3ec715c260c08de04dd38936ac2d09fbf8e32de32f00450f46d2cce
font_01_sfnt_off0000e269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE269 10364 bytes
SHA-256: 8592b27ddaf7a703ed4f3f351b3b9228ed23c2fba01ee1468edcfe74ef87fe6f

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