Malicious PDF — malware analysis report

Static analysis result for SHA-256 d81214b3f6954a67…

MALICIOUS

PDF

81.6 KB Created: 2021-03-16 21:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6f19909de280106af1929637e8eccdc SHA-1: 726f3e94932eb9cb761dfc366256ebd4be1d19e1 SHA-256: d81214b3f6954a6780715b8ccb3bd26915c3d0d862ab15c2c46401edbb1ea971
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely as part of a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/award?keyword=ap+finance+budget+2020+20+pdf
    • https://cdn.sqhk.co/jurugaguvedu/vjgjgjF/rudeliwax.pdf
    • http://belkwigs.com/definition_of_economicsbx88b.pdf
    • https://cdn.sqhk.co/radageroboko/hhVNohj/rubber_duck_crossy_road.pdf
    • http://klossheff.xyz/auld_lang_syne_violin_sheet_musicrfv2w.pdf
    • http://grenkasalo4.xyz/zigalugecmh57.pdf
    • http://thelandofbadideas.com/79158564033xd215.pdf
    • http://legendbilisim.com/causes_of_tuberculosis_disease9b05c.pdf
    • http://afracheat1.xyz/6127843765257qfv.pdf
    • https://cdn.sqhk.co/jiledexuda/UBcxNih/48523467778.pdf
    • http://copyright-services-us.com/how_to_get_free_characters_in_contest_of_championsmg44o.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_cbaa1e4a931d4927a1acedc49e16057c.pdf?index=true
    • https://48bd7725-9370-4d18-884e-e75d7b70c9c4.filesusr.com/ugd/f241d9_9e7c110314394eb2ba0807e1814fb7e0.pdf?index=true
    • https://s3.amazonaws.com/dazinibonofobi/75929163422.pdf
    • https://s3.amazonaws.com/rujabepifar/eclipse_juno_java_8.pdf
    • http://gotuziput.epizy.com/xalewalegomelevulorewo.pdf
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_f671bc7bd46f4a019c01fd25cd916e2d.pdf?index=true
    • https://s3.amazonaws.com/lekelepowo/convert_vcf_to.pdf
    • https://s3.amazonaws.com/daxemo/91842908562.pdf
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_01295dfbb9f04e6c8e941b362d478444.pdf?index=true
    • https://s3.amazonaws.com/xufaxoferugod/asco_guidelines_breast_cancer_survivorship.pdf
    • http://favilogas.rf.gd/rurexiruvesejuxovevinurum.pdf
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_ce2a5341dfb545399c716bae73970b87.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100fb.bin
3cfd6c4fc90a0ff9a20a124777959cde41f0c32a63e3a484640974b84c140a85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100FB 5420 bytes
font_01_sfnt_off00011380.bin
4c2cba5afeafac2cbda71586225e943213335a7b931e5cb4bde9106a65689afd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11380 10600 bytes

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