Malicious PDF — malware analysis report

Static analysis result for SHA-256 812dcea3a861c9c7…

MALICIOUS

PDF

117.7 KB Created: 2021-02-16 05:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a8aba5f2b9861f848760a4f9b1c6d334 SHA-1: 59f8166e229bfdc096584f3bb7eb55d82759e96e SHA-256: 812dcea3a861c9c7a2a145839de5490dad5bef8d6aaf64402841cac46566e58a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to contain search query text, suggesting a lure to trick users into visiting the linked URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=how+old+was+sylvia+plath+when+her+father+died PDF link annotation
    • http://dulexip.22web.org/lol_dr_mundo_jungle_guide.pdfIn PDF document text
    • http://trokot-newshop.online/10544399259qec8k.pdfIn PDF document text
    • http://deemonatrafik.xyz/descargar_gratis_bestiariole3jd.pdfIn PDF document text
    • http://klokisik.space/apa_format_citation_websitendtjh.pdfIn PDF document text
    • http://afracheat6.xyz/jobs_after_phd_in_english_literature_in_india85wqd.pdfIn PDF document text
    • http://frut-tree.site/9435661949s3eay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384639/normal_5fef0d28e4852.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/zalomi/xejagepamiwojirutikozutug.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/mixilovolimutigunanere.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/gavegezero.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/metastatic_colorectal_cancer_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/63493753367.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/basifubotanekilafomozefo.pdfIn PDF document text
    • http://sunuwib.epizy.com/doxufulorumanixupes.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_off0001905d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1905D 5344 bytes
SHA-256: d19d029644ee88b42753134f489c6174cf386b639ceb894c004e8c829e04cf81
font_01_sfnt_off0001a29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A29E 11472 bytes
SHA-256: 8f023e0102c4a2b480c8133c1bbae0fa840cb22b41658dd6c1a7a3aad11c8b0c

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