Malicious PDF — malware analysis report

Static analysis result for SHA-256 306ac41fb6493098…

MALICIOUS

PDF

59.0 KB Created: 2020-12-03 16:35:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e1babfb1207c8fef5fdcd74b3f46e380 SHA-1: bbe9b3c013e25359d9c4f88aceb6222114ef673a SHA-256: 306ac41fb6493098048f896c1f1698b39506f07384e2aa32fafd1f4f0baabd7c
154 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics as malicious, including a critical finding for a malicious redirector link. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to a known malicious redirector, indicating an attempt to lure the user to a harmful site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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.
  • 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=describing+a+person+in+spanish+worksheet In PDF document text
    • https://zetizisoxaw.weebly.com/uploads/1/3/4/4/134498522/basodebotavuw_duvenupawu_fidowavuzarujul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453144/normal_5fa1f1810dded.pdfIn PDF document text
    • https://valetapos.weebly.com/uploads/1/3/4/2/134265584/rinevedegavo-lasavegamalumuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410027/normal_5fc7d66d4fc00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383136/normal_5f8e594383bf4.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/7e8842e0-a642-43d6-89f4-324db57ff2e7/87428202098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95cd7179-ece1-4c4b-8954-5f5508185a8c/silent_paint_remover_1100.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5be32116eb00e3c6d2e31/t/5fc819e4b0f45b2a3d17f9e3/1606949348686/kpop_music_chart_2010.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f572e9fc3622d52f966f/t/5fc537f67acac6192a6b299b/1606760439623/sisufizaxer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc011b424b06a7eb3fa7d30/t/5fc627f061e25426e109f5a3/1606821874591/53260500177.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_off0000ade6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADE6 5460 bytes
SHA-256: 1e8fe32740df45dd46acca5c320b510f854529fd4f031c4edd712dd1a5d23919
font_01_sfnt_off0000c088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC088 8992 bytes
SHA-256: 0313de88bf9729a4c924a0fed5f1c24677d73c5d7c2da27f36a4d126aa890251

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