Malicious PDF — malware analysis report

Static analysis result for SHA-256 c419862f7015d893…

MALICIOUS

PDF

102.1 KB Created: 2020-12-13 22:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f98b18f3cd5410222bcf33f3785702ea SHA-1: bbc62ab4cd5246aceb2781b52a7f82a034293a2f SHA-256: c419862f7015d89327e5972793ee7ac580a40d62616b05face4379bb04131cf3
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/aws?utm_term=anatomia+microscopica+renal+pdf'. This URL is known to be associated with malicious activity. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector strongly suggests an intent to lure users to a harmful site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=anatomia+microscopica+renal+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5f90c3130be49.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/051efed1-7881-458a-b491-2dd3069b0b2b/appian_way_pizza_meijer.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/11007806323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e2ead02-7a6f-444d-8779-7a5f00a1e8a3/fidenavesiwunudodijupug.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6858cd49dd124475b394f/t/5fc8676af97c193540ef1117/1606969194848/mepebakaxufaxejejuloxaxa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6887fa04221c71187c69/1606379655845/76189900125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03536560-1c88-45a5-9696-e55329a4f8dc/8691459551.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/aleatha_romig_consequences.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc101f96609fd0ee791e489/t/5fc16bf92dd96f591824d795/1606511609497/xusiwudexajaxup.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/spreadsheet_compare_2016_missing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff9cbbd-a8e3-4a3b-8046-a8262127f4ba/52659289379.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/physics_book_for_css.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/13179829693.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/sous_vide_scallops_torch.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/wupedew.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_off00015061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15061 5288 bytes
SHA-256: d3cdcc5a5d2862b4cbf543378ebf5099d47383cc1ad874d66448b0b64228e099
font_01_sfnt_off00016248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16248 12080 bytes
SHA-256: 94a88f6b4446a26315458075917b58584669f6613fe379220bb7bdc7a93bd200

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