Malicious PDF — malware analysis report

Static analysis result for SHA-256 c13b18b15332f226…

MALICIOUS

PDF

75.5 KB Created: 2021-03-01 17:13:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 81c57d37d1e4dc35cfa60f84d3ec23d7 SHA-1: 57346823e6bbde36ff0d303f60d72125f21860b7 SHA-256: c13b18b15332f2261837ee7d3c0a8b86ce386e547a373b7938afc540976e7585
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of external URIs and the overall detection profile suggest the document's primary purpose is to facilitate a malicious download or redirect.

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://pelibifir.ru/award?keyword=skyrim+optimal+load+order PDF link annotation
    • https://cdn.sqhk.co/vasibejovej/b6qJhb0/63208274577.pdfIn PDF document text
    • http://goduvide.22web.org/coloring_worksheets.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/how_to_momentum_day_trade.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/un_curso_de_milagros_leccion_329.pdfIn PDF document text
    • http://vasabizav.22web.org/rafejivigujo.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/hdgc8ij/jubugadefikoxa.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/kakidozowinavafitudozo.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/kaxukok/bhakta_prahlada_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/fifugivarox.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/34801036708.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/wujogewisijo.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/mail_aruba_su_android_imap.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/91693864144.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/fujibesanobavir.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/amazon_platform_as_a_service_pricing.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/78934012229.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_off0000ebab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAB 5196 bytes
SHA-256: 6f2b965fb84242cf271d05e05acc431348172492a70ea908dfd98b97e03c5f3a
font_01_sfnt_off0000fd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4C 10492 bytes
SHA-256: ac7fc81ab73e0bb287c1d36e6599aab32eda83770937767b08dc51d1607a0bbd

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