Malicious PDF — malware analysis report

Static analysis result for SHA-256 396365f362687688…

MALICIOUS

PDF

71.5 KB Created: 2020-11-19 08:21:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e4afe8ddbd0baa12e7210d20911d0540 SHA-1: 1e5969dee76b94133d0d679ad713292af3a708f5 SHA-256: 396365f36268768817c1161f22e17af0ecdcc18c1dccbdc17a3a853c4e7da42f
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/123?utm_term=fallout+equestria+flash+game In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384144/normal_5f92594e2634a.pdfIn PDF document text
    • https://fuxomuvepanagal.weebly.com/uploads/1/3/4/6/134611725/5048981ee8b3eeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443799/normal_5fa84f2cacf4b.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/f6c76084-0781-4e44-80d0-da6d0dc6410e/58216862227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b20d223-b02f-4f15-8920-a58f6ac54458/62993815297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30cc164a-aa1f-46b7-ac23-5d1728310e33/xaliza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/329ebdf0-efe9-42df-b664-8990fb0b93da/6192147286.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/curso_de_piscicultura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ae9954a-aa59-41b2-91d6-49ede6963654/rapid_review_pathology_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/davubav.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B5 5260 bytes
SHA-256: 2565217e134661fb1d27eb2e3705e3e0dee8039aafb6d3380d8169b21f38737c
font_01_sfnt_off0000d676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD676 10976 bytes
SHA-256: 8388750f80269d0b7635b92c3a52b35919cfb9a761a7276d267b0e9f2de0e6b4
font_02_sfnt_off0000fba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA7 16344 bytes
SHA-256: ee555accfcbfe733943fdea85d510336663fb56900f18d05e8b2ddc98d815b34

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