Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c114476bcdc960…

MALICIOUS

PDF

80.3 KB Created: 2021-02-11 15:17:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 87a5657891bdd9b8abac54c7107e8e64 SHA-1: c5b4dda57f986d69d61287938fecbcecbfc48190 SHA-256: d0c114476bcdc960e72c61ef8c531ec0997ffb1f229d9402747e31610dcb8bf2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites or download additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wix?keyword=edgar+martin+middle+school+phone+number PDF link annotation
    • https://cdn.sqhk.co/bapuwanuvadi/geijocx/words_in_a_pic_level_2493.pdfIn PDF document text
    • https://salobomuxalevi.weebly.com/uploads/1/3/1/0/131070078/lasojum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_600a031939d7e.pdfIn PDF document text
    • http://hihikane.space/shadowrun_5e_rigger_5.0_errata5vhl0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448357/normal_600d9f6255ce4.pdfIn PDF document text
    • http://italylife.pro/18229313025146jy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476751/normal_6005494fef7e4.pdfIn PDF document text
    • https://vajugape.weebly.com/uploads/1/3/4/7/134767319/2649b58.pdfIn PDF document text
    • http://options.expert/kitchen_cabinet_sizetdexj.pdfIn PDF document text
    • https://filukekab.weebly.com/uploads/1/3/4/4/134478490/pefejejuxawe-nusofales.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/hh4Fifj/lojativipasejumavomoje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450350/normal_5fe519d300beb.pdfIn PDF document text
    • http://drenajkrasnodar.ru/96448616379zintg.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/jinabisura/jaludajunokadizal.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/faramuzovonuwafijurovipi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/36196071088.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/7583772072.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/choose_the_correct_form.pdfIn PDF document text
    • http://gozipoxux.rf.gd/tutokugogatuxeliwoze.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_off0000fbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDA 5584 bytes
SHA-256: e0c75757e8754a71fb42b9d91f1d570f0044b19431ee1f5ec75ab169d82fedb6
font_01_sfnt_off00010eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAB 10720 bytes
SHA-256: 3fa06b023e4deb24a9ff65c6fe2949c5b43ea65cd431c51ea01ae952a55e1eac

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