Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7518da6d2ed6af…

MALICIOUS

PDF

351.8 KB Created: 2021-01-11 08:18:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 02da8b0206645121063801fe2f7546e4 SHA-1: d46b327c05714037372c02ba325801943e7b34a2 SHA-256: 5c7518da6d2ed6af0e35966d3cc325acaecf3eacddcd60d3888d7d9f74567c59
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://ggtraff.ru/aws?utm_term=eas+esc+guidelines+dyslipidemia+2019'. This indicates the document's primary purpose is to lure the user to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of PDF redirection often involves embedded JavaScript to facilitate the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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://ggtraff.ru/aws?utm_term=eas+esc+guidelines+dyslipidemia+2019 In PDF document text
    • https://site-1174961.mozfiles.com/files/1174961/gowavazala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470833/normal_5fad4b661a481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406229/normal_5fe694836b241.pdfIn PDF document text
    • https://site-1171866.mozfiles.com/files/1171866/84451328942.pdfIn PDF document text
    • https://site-1167951.mozfiles.com/files/1167951/gofanagizojipukigorotugif.pdfIn PDF document text
    • https://site-1179415.mozfiles.com/files/1179415/business_plan_example_restaurant.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413851/normal_5ff8de5201eaa.pdfIn PDF document text
    • https://site-1213700.mozfiles.com/files/1213700/assistir_furia_de_titas_1981_filme_completo.pdfIn PDF document text
    • https://site-1178182.mozfiles.com/files/1178182/snes_online_controller_release_date.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/defajesojades_ruxanig_gakibegowup_wozewude.pdfIn PDF document text
    • https://site-1168448.mozfiles.com/files/1168448/pejakujukukojuzitox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5fb6a06057897.pdfIn PDF document text
    • https://site-1172418.mozfiles.com/files/1172418/galaxy_space_shooter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000519f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x519F1 5836 bytes
SHA-256: 5b167e0feeef073f53fff6279268b4c28c952b489864c46c896b5c8c2b4d6e1e
font_01_sfnt_off00052dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52DD4 13948 bytes
SHA-256: 761c3f86167240b07697f6f62db914d2144affc03b8298942b152a91464ae4ab
font_02_sfnt_off00055abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55ABD 16148 bytes
SHA-256: 49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648

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