Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b5703efdb14a2f…

MALICIOUS

PDF

68.7 KB Created: 2021-01-10 01:52:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: eaabc7c59225aaf6200c164db372b452 SHA-1: afe2895e70a7685e0f25c4037412e95e331c59bf SHA-256: e1b5703efdb14a2f6ba46c47913d3f6735ad672ef60facbc7d598a5c4702d269
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/aws?utm_term=spreadsheet++for+windows+7+32+bit'. This URL is presented in the context of a 'spreadsheet for windows 7 32 bit' lure, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/aws?utm_term=spreadsheet++for+windows+7+32+bit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_5f9f77de34644.pdfIn PDF document text
    • https://cdn.sqhk.co/lamijaluxeso/lmyLpjc/xbox_one_series_x_in_stock.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385197/normal_5f9f56847e08f.pdfIn PDF document text
    • https://site-1176302.mozfiles.com/files/1176302/duwikelikodedilepeme.pdfIn PDF document text
    • https://site-1084247.mozfiles.com/files/1084247/vemawubatevobewigowene.pdfIn PDF document text
    • https://site-1216672.mozfiles.com/files/1216672/wemefelivokotumikufu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422627/normal_5fe3b386b5222.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481280/normal_5fc5411873f25.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/jcDgfjf/xodagamanufojuparapo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403684/normal_5f97835ac9a79.pdfIn PDF document text
    • https://cdn.sqhk.co/nubokeso/ahcjjid/posofuzoxomajad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ce2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2C 5808 bytes
SHA-256: 20cc2cf648761fdb60f18d1a4b8c1057baf623108e37ef5344993e0a40f9ccc4
font_01_sfnt_off0000e1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FF 10528 bytes
SHA-256: cfed8d338e7b8f64fa450ebe8964c252c52e80cdac476237bbfa3df302b77f67