Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de759c1126fa0bc…

MALICIOUS

PDF

66.7 KB Created: 2020-11-11 20:37:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 30a7c8d348261ef870bb4ccda6e782e5 SHA-1: 59e52a57b118dd1c9824f1e77e0f05a497275668 SHA-256: 6de759c1126fa0bcc90af5212a35e286f78bf3bb032fde8c3ddbc3c32cb42112
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a pattern of directing users to potentially harmful sites, likely for phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

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
  • 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://ggtraff.ru/aws?utm_term=free++voip+software+for+pc In PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/1887995.pdfIn PDF document text
    • https://lakalenavis.weebly.com/uploads/1/3/4/3/134313358/gajixabobuxudev.pdfIn PDF document text
    • https://fiselowozol.weebly.com/uploads/1/3/4/3/134366189/e786479c1093.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/b04b0437-a27b-4284-8e75-72120f03fdbc/free_printable_venn_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08483d26-217a-433f-a433-7703499a5533/64362176949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a180c35-2707-49de-943f-0e74b26f722e/apk_google_chrome_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17048754-f197-45dd-a050-b936c6956fd5/protocolos_de_internet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a467bee-fdc7-40e0-845c-94f0a65d9f15/arkham_origins_catwoman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb87f3b9-8017-40ac-a55f-58602e2fd766/36086068317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f52d4f38-796e-4bcf-bca4-4f4c270b52a6/governing_texas_champagne.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/47855739503.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/30959598648.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_off0000ca61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA61 5084 bytes
SHA-256: 3f43f48984354da8b38882725d56245d2d2ac4136af8de54cbb7c81c149c14e8
font_01_sfnt_off0000dbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD7 10200 bytes
SHA-256: 9169ee41f71932539d9ab83d47a74cbfdac1cd637ec6bdf402b263aef3002bc6

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