Malicious PDF — malware analysis report

Static analysis result for SHA-256 07387e651d39ac38…

MALICIOUS

PDF

73.2 KB Created: 2021-01-25 09:36:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: bf738e7ad920d2274b817da557c6a510 SHA-1: 7de9369c5a9b8d38c66759738c9dbaa0b5ad17eb SHA-256: 07387e651d39ac38c31894ea19b307d7a4eccce18608cb6a255694a7947bf145
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to PDF files, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution campaign, likely leveraging embedded JavaScript for malicious actions.

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://trafftec.ru/aws?utm_term=instructing+counsel+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4493200/normal_5fe13f4ec6cfb.pdfIn PDF document text
    • https://cdn.sqhk.co/bagadogod/cThaich/vakixewumajejuxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426425/normal_6001f7f7d1cb4.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/ijhehcB/75503837426.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473410/normal_5fdf39155099f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502500/normal_5ffdbf4a4e3e0.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/itgjgi1/74919453062.pdfIn PDF document text
    • https://pilawero.weebly.com/uploads/1/3/4/0/134095891/6c42b.pdfIn PDF document text
    • https://nefufepaxesa.weebly.com/uploads/1/3/1/4/131453268/26b5a6cc41.pdfIn PDF document text
    • https://cdn.sqhk.co/tikalijit/7giCdjb/functional_and_matrix_organization_example.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495058/normal_5fe4b6955db14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374189/normal_5ff83217e0ed3.pdfIn PDF document text
    • https://lepovomika.weebly.com/uploads/1/3/4/7/134701686/0041d00b10203.pdfIn PDF document text
    • https://gidapozu.weebly.com/uploads/1/3/1/3/131379371/wexusejakuv-disojogi-jutefopuren-wifisuromovu.pdfIn PDF document text
    • https://fuvedomuwipiw.weebly.com/uploads/1/3/1/6/131636935/8573da179dd6.pdfIn PDF document text
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/5493155.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/rujabepifar/cute_dolls_images_for_whatsapp_dp.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/karuppusamy_kuthagaitharar_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/ac_market_mod_apk_no_ads.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_off0000e133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE133 5192 bytes
SHA-256: f66aeaee9ca4e7b9414dca8cbe21a3559e63d6f911c2b08da4d440d92809b1b4
font_01_sfnt_off0000f2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C7 10684 bytes
SHA-256: 9427a26ee52548fe75141e5e69955e0c468ef5469333dd43b69cfb168099ddb2

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