Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c152b3c5fd4aeae…

MALICIOUS

PDF

78.8 KB Created: 2021-06-04 05:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2b56b0aac9d33b36bf09a4f54910a559 SHA-1: 523770e9ce7292ef745f49dc3978d9dc51cc5b3a SHA-256: 2c152b3c5fd4aeaefb9db63df9f522d920fcb8558032d3b5388b384f3d32441a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://pixomot.ru/pbw?utm_term=autumn+leaves+classical+guitar+notes+pdf PDF link annotation
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/xofatixozu_lotesavari.pdfIn PDF document text
    • https://debemalimuwu.weebly.com/uploads/1/3/4/3/134385929/f42aa044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379222/normal_604325573d019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445871/normal_5fdcedae9ee38.pdfIn PDF document text
    • https://welarozukakiwa.weebly.com/uploads/1/3/4/4/134497755/mojatetokuwuso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_605bf6c1758b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467945/normal_5fef52f7f266a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377925/normal_5fd31d896742c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485457/normal_60230510ebcba.pdfIn PDF document text
    • https://lufojegixibebaz.weebly.com/uploads/1/3/1/4/131407324/titepaxe_wanutinuselil_pobitafonewe_tubuxixuwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496225/normal_605c685573a60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388063/normal_5fdfa85b277df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_603a7764596c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470821/normal_602950240b700.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/305f8c49-1cc8-4db2-af8f-27b59df94fef/44725822113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68fa247d-7b33-4ace-8b71-6367d245f465/89737726410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975a31a3-69ac-461c-ba4d-fd026573ecad/schwinn_a20_recumbent_bike_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a41021-8336-4d07-81e1-48a24122a588/46492384007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722267e9-f485-4cf3-82bd-0e22bd60fbce/how_to_write_a_termination_letter_for_services.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd869c5-dc23-436c-8a8d-c08f72ba6161/sopezatesewubezofen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a74521e9-4336-465d-9a73-ba9b5cbc19c3/how_to_get_rid_of_alcohol_smell_on_your_breath.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79731e66-32e0-49f2-ab00-ce500f060962/the_miseducation_of_the_negro_chapter_4_summary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DE 5408 bytes
SHA-256: 2be3d8603eeb2fe895efcd86d3cd69e3ae65a3d1c4d02963577abf106213c878
font_01_sfnt_off0000f62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62A 11404 bytes
SHA-256: 1d61d966c270fd3a362033139a3b3e6fad8bc7a5b4278253e329b29fa19925e1
font_02_sfnt_off00011d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2B 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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