Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed32ee06ab5d5ec1…

MALICIOUS

PDF

84.0 KB Created: 2020-12-24 13:32:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9f6b01513f0ed555db97b75e56306425 SHA-1: 735cf16d3c09576a8c613369aad7e65416d13fd5 SHA-256: ed32ee06ab5d5ec1d4b35068e2707c77c854f5e2f052d6e57e0ce282217be39e
222 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a 'download button' heuristic further supports a lure-based attack pattern, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=meaning+of+postal+ballot+form In PDF document text
    • https://static.s123-cdn-static.com/uploads/4382423/normal_5fde760a04c51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426960/normal_5f9d2a5ed6e95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416327/normal_5f972a81340cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f95e5e2c6848.pdfIn PDF document text
    • https://vokujesezi.weebly.com/uploads/1/3/4/3/134306830/jojani.pdfIn PDF document text
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/171491b392244d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446782/normal_5fac3653939bb.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/193935ce-2fe6-4fdc-b55a-8d8ff337564e/8730264796.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/93810414784.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/chrome_windows_xp_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/basic_english_for_computing_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/mr_archer_mod_apk_unlimited_money.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/97374766434.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_off000107c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C9 5364 bytes
SHA-256: 6e011a42026445531535de9dd485c3dff5833047af9c35baca991c3ecc4ba05e
font_01_sfnt_off00011a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A04 11636 bytes
SHA-256: 98dbe08343f171673e4c8d508637a464a064343afe64ac935830dac86221d777

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