Malicious PDF — malware analysis report

Static analysis result for SHA-256 c953707035f02cff…

MALICIOUS

PDF

59.4 KB Created: 2020-12-22 04:34:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ab0dbbd07c5cd636911dcbfd33c1bb1e SHA-1: e76d0636877580e0c07821b746f1a50caad36a87 SHA-256: c953707035f02cffe9499f76e61720e99007a89b7310f4a196af94c961534a5d
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms and redirectors, indicating a phishing or SEO manipulation scheme. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious redirection, potentially leading to further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=2013+cadillac+ats+repair+manual In PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/69473b8dc1.pdfIn PDF document text
    • https://jewelalebun.weebly.com/uploads/1/3/4/5/134585336/3756437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470832/normal_5fb25eff30350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_5f93e87b8996b.pdfIn PDF document text
    • https://nijenemal.weebly.com/uploads/1/3/4/4/134465501/sexafizujakojijomoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_5f9675410c22e.pdfIn PDF document text
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/dezetimevunu.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/01fc0bdc-c93d-40ef-9245-1ca837298d0e/chapter_10_cell_growth_and_division_vocabulary_review_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/company_logo_png.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/ni_no_kuni_2_fai_do_silver_nuggets.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/bluetooth_free_for_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/93284141131.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_off0000ad11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD11 5612 bytes
SHA-256: 0f269b919f2dde508daf94d6c7362de1fe3ee542f5d40c02f572aefcb52d08de
font_01_sfnt_off0000c011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC011 9636 bytes
SHA-256: dc5c7f04ef2f789fa3e274ae0c684755360bbec332b0592d54e23d19f9793ff1

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