Malicious PDF — malware analysis report

Static analysis result for SHA-256 5272438903b0a144…

MALICIOUS

PDF

67.2 KB Created: 2020-12-03 07:39:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fffba47b9a4db04c85270a2ddf0dee44 SHA-1: 1f43b9292edffb9dad7c4ad46541134104e4ae61 SHA-256: 5272438903b0a144e057499658cc9640d3b26a69d388b0e0ba66d752289edbee
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/123?utm_term=poe+tools+synthesis'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?utm_term=poe+tools+synthesis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5fc329a8af259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_5fb3633b991bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403685/normal_5fafdc01b60e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368471/normal_5fc5b6130dc63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375351/normal_5fa49e69e41d8.pdfIn PDF document text
    • https://bapepewemeg.weebly.com/uploads/1/3/4/7/134702997/7caf7e26ee.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/c460b0a6-04c9-4ef2-adf7-200e02ecdf4d/autodesk_revit_file_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/935bc7a0-064c-4c5d-9443-ce00225f3b6f/conquista_y_colonizacion_de_centroamerica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d7cde3-341f-4de6-a0ca-8192e60b124b/couldnt_unmount_disk_external_hard_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d1db73-fb89-4bf8-b986-997714a496b5/jumogasopomovaruf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa56c72-ea43-41df-857d-99965a608714/26027384548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc6e6def-9d5e-43e8-be62-f9c3fac60d7e/81057345499.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_off0000ce31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE31 4572 bytes
SHA-256: 1dc25021a03798a77b50267cceb53f4eb23bfcfbad3a1b98f672b00b5c7147bf
font_01_sfnt_off0000ddc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC3 10128 bytes
SHA-256: c39912150c311d23a8ef7685283241056c068ac47ef856b8727e6cfcc42706f1

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