Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac34a8415a7c456…

MALICIOUS

PDF

74.8 KB Created: 2020-11-20 06:21:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ceb4941b07deca8ead46018ed4553a59 SHA-1: d2ae49401f9dc0f645decf932e235eafc1f7130d SHA-256: cac34a8415a7c456088fcc4570bd37df143c49b9bfe0d77b6640896c43648462
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 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=problemas+de+sumas+primer+grado In PDF document text
    • https://cdn-cms.f-static.net/uploads/4466166/normal_5fb7221c932e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379612/normal_5faf3e0d836c0.pdfIn PDF document text
    • https://tapojofam.weebly.com/uploads/1/3/4/5/134518610/1f774ce2984d23.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/jadurekofetuvedu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404524/normal_5f9fc0f1d3c19.pdfIn PDF document text
    • https://wemugevesusufe.weebly.com/uploads/1/3/4/4/134467109/gegivutef.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/bf5e1edb-b1d1-40b7-ad36-0f88efee42b0/60938669020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3e808bc-d720-4ceb-babe-6715bfe336bc/67618530386.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/juzuni.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/tivovusagex.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/essay_on_savagery_in_lord_of_the_flies.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

Related samples 8

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_off0000d0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B8 5420 bytes
SHA-256: 7d54a1b36d29f05303a62746092a30326a95b345b58197ec91d344e08786229d
font_01_sfnt_off0000e300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE300 11216 bytes
SHA-256: c74f92607b6cf1c0b7e55a8ae816211ff2054935b13dc56942386bc9e7dd8b15
font_02_sfnt_off000107b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B0 16124 bytes
SHA-256: 2d28dd8d55906943ecdef0e06c16de40d023931e7c445e737a75b065090ba680

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