Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffe3c9b449f679f…

MALICIOUS

PDF

73.3 KB Created: 2021-06-08 02:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 86e1cfece0484d0f6974c16d00cc36d2 SHA-1: afcc091ab537922179ad9c528671b0739320eee7 SHA-256: 7ffe3c9b449f679f333cb610dff9e6cf8314b13defcf5c3250464d94b60cf185
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://krisoc.ru/pbw?utm_term=bike+race+hack+mod+apk+download PDF link annotation
    • https://gawugabel.weebly.com/uploads/1/3/4/3/134361726/1901796.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368266/normal_5ffded17a8ffa.pdfIn PDF document text
    • https://makonajarozov.weebly.com/uploads/1/3/4/3/134341931/4497549.pdfIn PDF document text
    • https://nuruvubapifak.weebly.com/uploads/1/3/1/4/131452890/wuteza-pekeg.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/luxebaxukuj-lilawu.pdfIn PDF document text
    • https://rowurasivove.weebly.com/uploads/1/3/4/3/134357219/2f74f9610.pdfIn PDF document text
    • https://xolitosoxi.weebly.com/uploads/1/3/4/5/134583661/barisamot_bijuzu_zidaf.pdfIn PDF document text
    • https://jesixuruforake.weebly.com/uploads/1/3/5/3/135328729/vilubon.pdfIn PDF document text
    • https://varusotefus.weebly.com/uploads/1/3/1/3/131398431/kasilolipadutusoxeki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411250/normal_5fc937bf64159.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369179/normal_60084fe46c8f4.pdfIn PDF document text
    • https://lefagetali.weebly.com/uploads/1/3/2/3/132302894/6205145.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402944/normal_5ff536f48ef12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sijomirurefi.pbworks.com/w/file/fetch/144444903/55706501368.pdfIn PDF document text
    • http://wixugigir.pbworks.com/w/file/fetch/144439215/31383141877.pdfIn PDF document text
    • http://disisopaz.pbworks.com/w/file/fetch/144820314/complete_interview_answer_guide_free.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_off0000e0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DA 5340 bytes
SHA-256: ae06fbd64c9d9357598e0874d03c557ec814d5ade33431af82e6e5bb5a8ea5c2
font_01_sfnt_off0000f2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EE 10924 bytes
SHA-256: 6084b4d0393b68656b1299366a5b04d69c321456025063c91d8b1a4f03becf0f

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