Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f98b73ac0e0cb0…

MALICIOUS

PDF

78.6 KB Created: 2020-11-11 06:18:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 260dc4a8e0aa60b74ceb506ce1e6b430 SHA-1: 21a426a6ea2079d3e672eccd61b800c9d4c1645d SHA-256: e8f98b73ac0e0cb04521d3b4d24eac0dbfb1a93c7ca33c1af14543693f1a6f84
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link farm heuristic, indicating it is designed to host numerous external links. One prominent link points to a URL related to 'Roblox how to get the buff noob package', suggesting a lure for phishing or a scam. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?keyword=roblox+how+to+get+the+buff+noob+package PDF link annotation
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/wajosemimanisonoliro.pdfIn PDF document text
    • https://sejabekozifox.weebly.com/uploads/1/3/4/2/134266090/405f2ff3c555.pdfIn PDF document text
    • https://menuwenuxunok.weebly.com/uploads/1/3/4/6/134682317/4821900.pdfIn PDF document text
    • https://jajoteraluwem.weebly.com/uploads/1/3/4/1/134108878/5332929.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/wipitamer-fodugaji.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/vukumesoj/5716079079.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/women_s_body_measurement_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0640ccd6-7053-4650-b07a-00af551ac111/12173636061.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/74209056670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c871f9-bf25-4f88-905a-45ac5e885bfe/xbox_360_free_avatar_props.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd1f8140-ef68-43b0-86d0-c4dd67b2f9b7/nth_roots_and_rational_exponents_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/act_3_study_guide_questions_the_crucible.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_off0000f387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 5372 bytes
SHA-256: 5408697a90270ceee0172acb39e4a479b7cc411296f8f65b996c1e6f9736d8d6
font_01_sfnt_off000105f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F9 11020 bytes
SHA-256: 190ffc17c749e76fef27e85ed2943ceeb95de393eeaa6e6bf9549d6cf0d97262

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