Malicious PDF — malware analysis report

Static analysis result for SHA-256 618e4b4c6a387108…

MALICIOUS

PDF

82.9 KB Created: 2020-11-22 05:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3b3c8fdaf8fb6297e21b65e49e9d8619 SHA-1: d5652a98c419e0d11cbd70b75ad99c781725693f SHA-256: 618e4b4c6a3871082b22181ce9dd8aeeaf8e72d02762f1f6e786088df62d1d4f
214 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 and routes users through malicious redirector infrastructure. 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=asap+rocky+live.+love.+asap+vinyl In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_5faf877185e7b.pdfIn PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/5781639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464852/normal_5fac487c9fc76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443624/normal_5f9fda271279e.pdfIn PDF document text
    • https://dokivubugu.weebly.com/uploads/1/3/4/6/134688884/dc98c.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/c2e5fb8.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/jukezeluf/achtung_die_kurve_zatacka.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/90451599998.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/discraft_os_buzz_z_line.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/boy_meets_boy_david_levithan.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/xekeximotida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35b05356-6ca8-4026-bfc9-9792a65e0494/kofafeduxedeverimesu.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 5

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7D 5916 bytes
SHA-256: 2bd9875650abbec18a6078d15d3bf614a46558c0745b9089966c5922aeb93c82
font_01_sfnt_off000102a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A2 5176 bytes
SHA-256: a3ffa1e6b18af4cfc7857fb406f1834e1ef0960fc5176ce3e5c438f523c023f2
font_02_sfnt_off00011464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11464 13324 bytes
SHA-256: 85849d47fcf5beb756f4c1305399b6b6d2cd228d73ed0a55adc3871080e3095d

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