Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6c6b39d7f56f8d…

MALICIOUS

PDF

213.4 KB Created: 2021-07-16 20:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 65b875559d3db36777c06a3b8213f6fc SHA-1: 0829d49aeb6f86d22976d13b341b05bff2f601a1 SHA-256: bb6c6b39d7f56f8d1c994719775341640c3d98fe5290a18aaa556eb1c94f33f6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous links, many of which point to compromised WordPress sites hosting PDF files, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://peterdegendt.be/file/94980334076.pdf In PDF document text
    • http://akkoryazilim.com/userfiles/file/dekalololetalelo.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents//files/kelujejidutapumarizuk.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081752ae5457---noxefixisegivilopolevaxu.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/fumod.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa3676a31b---widagug.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9cd65a038---38930130977.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/18979065528.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/23711328702.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a704e3de967---mijewoxewudejava.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/vubogazorosulizimosajad.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/hc09qbn9ggvv2h17barle80sv1/wezitimemigirepi.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/wutar.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/xebakagugunowabuvanewu.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085790a47ba3---68476477769.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/kqilsofbvp2qoekcf9inrmcvav/90041313241.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077f0d6c00c5---fobujatujuraxuvu.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/a48327a2dd23bfb033ecc5657277cdda/belod.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/d80b4fdbe86fee89496e5d21c27ff923/baramijorefexugugiloteji.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/c90fcd5289a6fb289918a28d38194c20/58075367056.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/pikedujixokog.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608d03c1e368a---wenitojo.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3badc497a---kenonugubu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=differential+cascode+amplifierPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002c114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C114 1240 bytes
SHA-256: 548550beeab23f7d0bb8272967e1b0b246e260a8ab61889fc6223adf603ad230
font_01_sfnt_off0002c83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C83A 16168 bytes
SHA-256: 34837fdfed7e6dc9e8c1ebc45eabef1064a6e89f8cd536305124148a4af1fb29
font_02_sfnt_off0002ddd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0002f5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5E3 20500 bytes
SHA-256: 1f4a0d12cd97855d92ea9f1d1d88ddc82fd8e4a267e7d991d113db6151f74b1f
font_04_sfnt_off00032c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C31 10780 bytes
SHA-256: 5c35f27846aea206e2a5a092ab4a4067a168bbbe224161ea4f53f775721484d6

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