Malicious PDF — malware analysis report

Static analysis result for SHA-256 5071ba3b33aee5fd…

MALICIOUS

PDF

70.4 KB Created: 2021-03-11 18:48:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4a8d8926b5c83cd8e1f2ee6c0ed85047 SHA-1: b4b63eb6b64e82c104edcd16df73841551688cb1 SHA-256: 5071ba3b33aee5fdc051d020f88de0f8caab920f2ff29589320b7301d4d7b51e
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, specifically flagged as a phishing trojan. It contains an embedded URL that mimics a search result, likely to trick users into downloading further malicious content. No scripts were extracted, but the presence of external URIs suggests a download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://bologen.ru/123?utm_term=cambridge+english+readers+level+4+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5fd836139f7e2.pdfIn PDF document text
    • https://cdn.sqhk.co/wifukatar/ffWYYiC/nasegufilatafot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_602096739c766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487662/normal_601b31cc65d70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456398/normal_5ff899913ab06.pdfIn PDF document text
    • https://cdn.sqhk.co/lilodipu/rVhjjep/silogujowetebafosivolu.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/jSQXkN7/bridebook_the_wedding_planning_approach.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/e3dhfqa/rofobop.pdfIn PDF document text
    • https://cdn.sqhk.co/xogatijixe/Sgggfih/pepupidig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444657/normal_601082578ef5d.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/aCajegg/mix_latex_paint_with_water.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484126/normal_603a1c8a6ee1d.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvapolaxaj/xhgjfhi/gitomajijasilovefitebana.pdfIn PDF document text
    • https://cdn.sqhk.co/wofetewa/W9Djggg/36542176809.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413968/normal_5fe28cbc3a046.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379220/normal_5ff669a56f919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_60405856434a9.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/loneminovu/subenoforijoreneg.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/zijulumisawajemudabudo.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/46378812527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75c02c1-cfd1-465a-8b2f-adaba4afb38f/pijuxexesenet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/326d45ff-bdaa-4c04-bd00-efd7e79a4228/97796698452.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_off0000d48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48D 5648 bytes
SHA-256: b68fd6908063a860d05ea86ee3f392255c9811590647e8597421b9ecb65c95da
font_01_sfnt_off0000e794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE794 10012 bytes
SHA-256: 126d10980977d71d0e56de54ce9a5493a1ad992105ea62363c481a4702704312

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