Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c16a30d60c168a…

MALICIOUS

PDF

64.7 KB Created: 2020-12-07 06:45:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d0a28f5d415c6a2cc21ec3d81634a67d SHA-1: de4025e4e0ee3ca0ba798a9afe7529d67b9e516d SHA-256: d3c16a30d60c168a64e9730086c914da8cf36532d0e2c93d7994662b96336af9
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 0.9998

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://trafffi.ru/strik?utm_term=galloway+elementary+school+henderson+nv+89002 PDF link annotation
    • https://kutenenoki.weebly.com/uploads/1/3/4/7/134704657/napol_zefobo_mizex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390681/normal_5f8fd6dc13c97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402486/normal_5fc7e76812c10.pdfIn PDF document text
    • https://somafixuwase.weebly.com/uploads/1/3/4/6/134605374/bujepesupobu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373509/normal_5fcc0c3374e22.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc6d84b5f0d731e16a86864/t/5fc843bd90a4f8549d721d7b/1606960061612/37226461283.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79ecceddbb05c68963a2e/t/5fc7f34dc5143377f5bd6fbb/1606939471073/38044311391.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50966f7cf8c7540456227/t/5fc6a1ee4f98375720c8d764/1606853106337/96570541089.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/bernard_arnault_biography.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/16762013915.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/mu_origin_2_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/82929651809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29d022be-5481-42bb-87b7-17a48c73f6e7/6189477125.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_off0000bb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB17 6088 bytes
SHA-256: 78c94fd2a1a04401d11bcd8c56cad8355a83b23ffeed9906db4ea8d158172521
font_01_sfnt_off0000cfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBA 11168 bytes
SHA-256: 9d2b385b504de6bcaa4f0d970af1e2568263b03db2513166181a156330a807a5

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