Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db50e5ce67265a0…

MALICIOUS

PDF

71.7 KB Created: 2020-11-20 16:38:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b1bbe3d5c5e180de38a1962971ca1426 SHA-1: 22e420323cf7263d83f294fc64b180ca6b54eb20 SHA-256: 7db50e5ce67265a0f11e31513270cbd4e8e4fb2ac5b075c2d00f8e4dbf16a121
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://traffmen.ru/aws?utm_term=palayathu+amman+audio+song++tamil In PDF document text
    • https://joleziravakejar.weebly.com/uploads/1/3/4/4/134460301/bf7c8.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/6741250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408996/normal_5fa83c8662edf.pdfIn PDF document text
    • https://vonizimawat.weebly.com/uploads/1/3/4/3/134385064/7532776.pdfIn PDF document text
    • https://sozawozoxo.weebly.com/uploads/1/3/4/5/134509422/saremunut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394060/normal_5fab1207d3b72.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/damerirazib/gafexanune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8023f73a-4869-46df-8891-87599428db56/xegisudigotojowetuxex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cdd7508-dda8-4123-8aa4-93d2f8fda1ed/36177055837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52795d61-c035-4f43-ab35-146c8fc202ba/tanipupe.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/15027999991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/087cb024-ff86-4085-bf6c-8bc494c77d3d/guide_to_edible_plants.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/cardiopatia_isquemica_electrocardiograma.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB68 5248 bytes
SHA-256: 2343fa5c0bf3d4abc875279d9938c024e40e458f52800d720c988e7b20a8601f
font_01_sfnt_off0000ed21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED21 10852 bytes
SHA-256: a3c55d257735fce92e94adb762be74600e1129159e4d39caceaf66bcb98ed12e

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