Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d70672c69ca64f…

MALICIOUS

PDF

65.9 KB Created: 2020-11-19 07:19:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f69bb28b651f3c439b524d1eb1fe41e9 SHA-1: 2f593e8fc863de281b64e644c104f3af662b3b7e SHA-256: 49d70672c69ca64f2c33ba3d6c13d13f5e43755b28b028bcbec5e9d535334deb
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://gettraff.ru/aws?utm_term=burna+boy+gum+body+video In PDF document text
    • https://jelosixonov.weebly.com/uploads/1/3/4/6/134666827/nomawimolevaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f965cd93f738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468268/normal_5fa684bd8ce11.pdfIn PDF document text
    • https://jezasowafinam.weebly.com/uploads/1/3/4/5/134530254/c396a5337b0a.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/gipug_xuvuzipufiwipob_fafilu.pdfIn PDF document text
    • https://noxetetejiv.weebly.com/uploads/1/3/4/3/134391164/9059968.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/190675a0-e3a5-413a-95ac-e0dd8e9a4c38/88478437724.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/java_jdk_mac_os_high_sierra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa7208c7-450e-4e42-ac99-931ee029e489/sapoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4b8d28-e8cf-4757-b026-9bd81ea7fa8c/64919790687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8993926b-8687-4a29-9ad4-e1e14d708e77/ralifomubogek.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_off0000af42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF42 5288 bytes
SHA-256: 665a9065d107cac6b9651806c5d236d14ba75c4065ef7b559a884da335c56bb1
font_01_sfnt_off0000c134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC134 10900 bytes
SHA-256: 589e8d49aee3c789eeaa4ff35ef164719e8935f2d24989443e74a1e9e817c80e
font_02_sfnt_off0000e64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64A 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940

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