Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d49371693112a3…

MALICIOUS

PDF

76.6 KB Created: 2021-02-25 15:24:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ecdfa4e6e567aee1235d5c8b49645131 SHA-1: 46c9fd02ba2c9df5adb84b7ea733b869b7ec3db2 SHA-256: f0d49371693112a3b448531e9a053f7a22baaf1d5b9d9b134d1b6771e15c9868
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or SEO manipulation tactic. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a potential attempt to drive traffic to these external resources. While no scripts were directly extracted, the presence of numerous external URLs and the ML classifier's high confidence score suggest malicious intent, likely to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jacksth.ru/award?keyword=a+river+runs+through+it+title+meaning PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410431/normal_5ff1d4bb67de7.pdfIn PDF document text
    • https://pibowalemarume.weebly.com/uploads/1/3/1/1/131164440/83479a365.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402501/normal_5feb79056ebb9.pdfIn PDF document text
    • https://sokotomajav.weebly.com/uploads/1/3/4/0/134040389/3321bfb36cc16.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/aDhjUjj/boss_loop_station_rc-_505.pdfIn PDF document text
    • https://cdn.sqhk.co/xajevedu/jDijjes/60069827714.pdfIn PDF document text
    • https://poxigupi.weebly.com/uploads/1/3/1/3/131398264/demulo_pugukofizas_fikofafopetube.pdfIn PDF document text
    • https://wirosumarot.weebly.com/uploads/1/3/1/3/131398493/1476524.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403805/normal_5fcb6ba08c3d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402481/normal_5fd03a6aeaf2d.pdfIn PDF document text
    • https://gifofelonapa.weebly.com/uploads/1/3/0/7/130775883/8980190.pdfIn PDF document text
    • https://bewirupudafa.weebly.com/uploads/1/3/1/6/131607000/teruroxif.pdfIn PDF document text
    • https://kesegupopu.weebly.com/uploads/1/3/4/1/134131766/1615891.pdfIn PDF document text
    • https://gikowotezura.weebly.com/uploads/1/3/4/4/134493608/0008c73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446930/normal_5febf6d75542a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489730/normal_6010a5f74ffc0.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/gatazeromij/18065813400.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/how_to_start_keto_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/26698532197.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF078 5148 bytes
SHA-256: d874fa1af2ae1638534b762f7b12f19d169187bd3918d9b7161fa7c1bf2db93f
font_01_sfnt_off000101d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D8 10424 bytes
SHA-256: 9b82ae026cbbf94cf1c119952e8afcadf1d652d71d4b011d279cc0eeaab165c4

Open this report in the interactive analyzer, or submit your own file for analysis.