Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c51a6d9a569544…

MALICIOUS

PDF

73.1 KB Created: 2020-11-27 21:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 576746e79591e06f8c44dc79d086cd68 SHA-1: d241b616e39a2d36aaeebdef0e0767a75fddedc1 SHA-256: 80c51a6d9a569544f4df217abf6eba30ece41f4117de0e916d76b07d75650ad4
154 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 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 0.9998

Heuristics 4

  • 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.
  • 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://cctraff.ru/123?utm_term=uke+play+along+thunder In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5fb60926c8c65.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/girutagazosu_towukebux_ledode_gisix.pdfIn PDF document text
    • https://viropozokuputaj.weebly.com/uploads/1/3/4/4/134441516/8813903.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/xupusari.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/jajum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392873/normal_5f8e441fb6576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f8998e6e9ec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498678/normal_5fb0007786eb4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b08cc706-a01d-42ae-94c7-751fe3035229/hungry_shark_world_all_sharks_unlocked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/faduwemisebixexusan.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/62550387156.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/walmart_threats_this_week.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/26376202509.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/gupotiraduvogedaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b783d70-1916-437a-87ff-ef22e16c12d3/sherlock_holmes_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/robajarepox.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC642 5200 bytes
SHA-256: 00b1e7dfe74621bf64532f92826ee0d109e65d2664e5dc0a8ea56a37849b5b47
font_01_sfnt_off0000d7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F7 10568 bytes
SHA-256: 0f3ac618f9cdc71d6c8a1fee4ddab52d110c02675a4a607679901fbc9c21fb16
font_02_sfnt_off0000fc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC52 17752 bytes
SHA-256: 7fea1da9deaa80f84249e641b3f713200a276248aa86134c2646dc0951ad7fb0

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