Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bd5f4e1e1ffcd2…

MALICIOUS

PDF

78.2 KB Created: 2020-12-31 00:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d98b400f02b5f618a271b1b25dfffca2 SHA-1: eddf97999d6d8bd937c6c23a048c73852e340aa6 SHA-256: 64bd5f4e1e1ffcd2e5c51cd078e5a15c261afc5f52f5b7c8d60bfdb95a6d2bea
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a malicious intent. The presence of numerous external links, one of which is a suspicious URL (https://traffnew.ru/123?utm_term=duck+life+hacked+1), suggests a phishing or content distribution scheme. While no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards an attempt to direct users to malicious or deceptive content, likely delivered as a spearphishing attachment.

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
  • 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://traffnew.ru/123?utm_term=duck+life+hacked+1 PDF link annotation
    • https://xasigali.weebly.com/uploads/1/3/4/3/134363336/8888530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498842/normal_5fac5d01762d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413017/normal_5fac221bbcf50.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/hajjkha/42544997708.pdfIn PDF document text
    • https://letazofuwukuge.weebly.com/uploads/1/3/4/8/134869061/fejikurejafisoj_lirerefupife_lusagiz_vezulupamaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/lewuravasu/a1gdUjb/cubesmart_east_nashville.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/lorifawuvawot/peaceful_pill_handbook_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cef7193f-c145-439e-950d-61b742bbcc20/guviduxugumizerobu.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/la_cumparsita_guitar_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6bf5d3-14ab-473c-8ffe-50b46033036f/6143714909.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/12321300897.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/huawei_magazine_unlock_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/vuxig.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB20 4952 bytes
SHA-256: 16c5a082c3480fea38a5ecbb251adbbe15c92cb76b20306d7e220a6b31609f1c
font_01_sfnt_off0000fc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC03 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00010766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10766 10772 bytes
SHA-256: d25291416c4bfd27b7a30b6b8e31fc5a85d8d0ef938a6c502d1d9a6f5c5ac015

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