Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e24edfe522a88d…

MALICIOUS

PDF

77.7 KB Created: 2021-01-02 12:28:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 5a4673eae4b47218f8ddc41c45fbf136 SHA-1: bf73927083f7ba97a3bdbacfa2d6ca57aba2d25d SHA-256: e4e24edfe522a88d88f1a1909faaf1973b7eb0b049c7fc3de48b74260372ef67
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to Weebly-hosted PDF files, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious campaign.

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://traffset.ru/aws?utm_term=action+hollywood+movies+free PDF link annotation
    • https://pabifiliponisod.weebly.com/uploads/1/3/4/3/134367040/4034334.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/8250183.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/3787719.pdfIn PDF document text
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/6408060.pdfIn PDF document text
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/gubemo_vukiras_litudejoz_saxuso.pdfIn PDF document text
    • https://fozumazajafipal.weebly.com/uploads/1/3/4/5/134588547/f73754d30e02e.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/domovivomi.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/724667.pdfIn PDF document text
    • https://sepetumeba.weebly.com/uploads/1/3/4/6/134601334/946ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/wemijemiretifotiwunixaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/90944307601.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/35705676926.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/bekhayali_audio_song_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/vector_canoe_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/13494351054.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/muxiwiluz.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/48153882547.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CB 5080 bytes
SHA-256: a411fe759d671f473aae67ea806a8d0989ac58d5e12ac0f02f14403f3af6012d
font_01_sfnt_off0000f8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F5 10168 bytes
SHA-256: c842aff1a3d5ce1a1ea3a6e70717f30dd06c9a8090d2a6c6b58128424642e364
font_02_sfnt_off00011bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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