Malicious PDF — malware analysis report

Static analysis result for SHA-256 018df1df5e6f9038…

MALICIOUS

PDF

76.6 KB Created: 2021-01-22 21:54:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a6b6cf2de554ba17d4390d2be57c1bb5 SHA-1: 032b14ffbb748b86ea605978d5414e3cbc8c027f SHA-256: 018df1df5e6f903830eeb72f25c94c4c5afbfdc93f5e1bc1dc22327202c7b1e2
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of numerous external links suggests an attempt to direct users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://crophysi.ru/123?utm_term=green+mountain+mall In PDF document text
    • https://cdn.sqhk.co/sowojusawepu/hhak9hd/turbo_driving_racing_3d_game.pdfIn PDF document text
    • https://site-1202138.mozfiles.com/files/1202138/shapes_and_forms_synonym.pdfIn PDF document text
    • https://site-1199448.mozfiles.com/files/1199448/customer_service_feedback_template_word.pdfIn PDF document text
    • https://foxufaba.weebly.com/uploads/1/3/1/4/131482874/e634ef.pdfIn PDF document text
    • https://site-1199448.mozfiles.com/files/1199448/1990683680.pdfIn PDF document text
    • https://jakugogafezokev.weebly.com/uploads/1/3/1/4/131437362/1892014.pdfIn PDF document text
    • https://sokirokesavosa.weebly.com/uploads/1/3/4/9/134901907/zibadenag.pdfIn PDF document text
    • https://cdn.sqhk.co/rawewosit/DjfWYjY/quiz_logo_answer_level_19.pdfIn PDF document text
    • https://site-1168164.mozfiles.com/files/1168164/vedibotagapawometogozid.pdfIn PDF document text
    • https://vituxusupodewe.weebly.com/uploads/1/3/1/3/131379836/vaveluk-suwosalano-levuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/g_p_sheet_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/deferred_income_tax_balance_sheet_presentation.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/gate_exam_syllabus_for_ece_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/alphabet_letter_templates_free_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/33845480547.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_off0000effd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFD 4684 bytes
SHA-256: c8dbe4af43483356594ee4eaa7c937344a5681b460f980efd8ecc012021ce832
font_01_sfnt_off0000ffcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCD 11032 bytes
SHA-256: f6a672a0976af05d7e902e4ed1adaf4b2eaf872400886d51490c63f3fd444bbd

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