Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47825ff6efb870d…

MALICIOUS

PDF

63.4 KB Created: 2020-12-18 16:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 830c082e9bd7e3d94f9448858c1341e0 SHA-1: 2b2e609c5356afd6cdcd6c04748104d1440d472c SHA-256: d47825ff6efb870d2b5788d77073275fc54c65a1e520a47c65dffea4b0870e4f
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a strong intent to direct users to potentially harmful sites. The ML classifier and ClamAV detection further support its malicious nature, classifying it as phishing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=best+buy+pearl+city+phone In PDF document text
    • https://lemevepavakupe.weebly.com/uploads/1/3/4/7/134701524/1099532.pdfIn PDF document text
    • https://jedapozopimu.weebly.com/uploads/1/3/4/6/134614290/7647642.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/jataxurukubiwij.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/88be7ff576edae.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/6f0c1ac9-d441-42b1-b105-12fd8eebee4d/hackett_polo_shirt_size_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d89672-95c8-4624-8dbd-49faa439ee88/atmosphere_layers_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d6b6514-2387-4d67-8a5d-856c94cda704/putowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdf293e1-1afb-433c-b737-d1148b890f94/is_styrofoam_recyclable_in_nc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf5bef8cdb769c6a8bfe8/1606284734590/zezuponakur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dee21c1-bd03-4ab0-b1b8-600357dc9706/jowidupuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4886ae5a-3368-45c0-a6e1-d96f10479307/bradescoseguros_portal_de_negcios.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf50719b1ed03538d19b6e/1606373489980/xemexuvijavavisiwetatekek.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_off0000bc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC49 5312 bytes
SHA-256: 75f14e1eb1f043c43cb2b6c23e6b1e85fa2b435d7c303cf664f8ad24a136687c
font_01_sfnt_off0000ce52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE52 10140 bytes
SHA-256: 173375046f51054779b3368cbe9531138016b3af908fb18468e53780b2ff023f

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