Malicious PDF — malware analysis report

Static analysis result for SHA-256 15760ac497a97e2f…

MALICIOUS

PDF

59.8 KB Created: 2020-11-26 14:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c11954d91af2fc5f97ac7a6dffd0920f SHA-1: 59c6e781613546e34073c2a2ae9abf2823683d76 SHA-256: 15760ac497a97e2f6f0e1fe0bb30c5e2b62364f928ac5c6171c9a4961d4d1b71
214 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The presence of numerous external links suggests an attempt to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/123?utm_term=the+breadwinner+essential+questions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f876ddcb9db7.pdfIn PDF document text
    • https://fejunula.weebly.com/uploads/1/3/4/3/134363834/08e3b1fc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5f88f22042777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476294/normal_5fb53e0fd984e.pdfIn PDF document text
    • https://xoxefalumigak.weebly.com/uploads/1/3/4/5/134527234/wegelaxuporogot.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/2a643ea0-8cfa-4561-8690-dfede7c89f6b/53280095569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6737a9b-3617-48c9-a3ae-8d17c212f75d/schlage_rekey_kit_40_132.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/powershot_pro_9100_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/71937722909.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/mother_s_day_brunch_menu_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3126c7a5-2900-4b69-a399-66b0604b890f/71841406295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4229efd8-5d9c-4fdc-825f-e289d7202def/60621685765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07ce0b2-f3ad-4891-ac41-d3939685ced9/dewope.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_off0000aee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE1 5220 bytes
SHA-256: 87380d354b4ed3481d1c568aa17dace35a415e2afa22c8d5c555455a8cfea225
font_01_sfnt_off0000c09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC09E 9932 bytes
SHA-256: 87f18a628d246ad057b4cf792499750c990309f4beabc8c60c4544754a8aacee

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