Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c5869441c41cc6…

MALICIOUS

PDF

68.1 KB Created: 2020-11-23 09:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cd20796a3817da0f60b2e4e7c7276373 SHA-1: d77e7e402c3df4ce6fc03fc76b1654c3cc7a2059 SHA-256: 65c5869441c41cc6e8b21154f11e8e8dad40789922adb28ac2d30dc0455efcce
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ClamAV signature and an ML classifier. It contains a large number of external links, many pointing to Weebly and AWS domains, suggesting a link farm or redirection mechanism. The embedded URLs likely lead to phishing or malware download sites, consistent with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?utm_term=rexxar+guide+wow PDF link annotation
    • https://peniwomafases.weebly.com/uploads/1/3/4/7/134705361/60ff8f.pdfIn PDF document text
    • https://dovogejeromew.weebly.com/uploads/1/3/4/6/134666082/nakawibebetemu_vedow_zukofotafa_fefijezusixim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/vatimuxeturoxulexilotej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41650d94-d704-4703-bd4e-b211cf99c306/1806219881.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/the_explosive_child_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f0381cc-f86f-4ce6-9ab3-2683ee860f15/60520499671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0bf842-d044-417a-af77-697cc445a372/nunazibiwol.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/letter_of_concern_army_officer.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/myopia_left_eye_icd_10_code.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/93675386475.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/17098761736.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_off0000d048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD048 4952 bytes
SHA-256: e0d5ce3b7c479c92b282137f32ae839d06353a52b32275e77177350d2ebc2ef1
font_01_sfnt_off0000e149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE149 10292 bytes
SHA-256: ee0b9d739445abfeb80d1fa89e86887928d2957e55ec7122ca15fb181cefae78