Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ae2e289f6f6eba…

MALICIOUS

PDF

73.3 KB Created: 2021-09-16 07:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cc170b69d801180b99afc186ba6aadac SHA-1: e5d3fac4bdec1337f395ef913a8d1096d149f224 SHA-256: 45ae2e289f6f6ebac61ac29197d87ad31bc3ed02ebbd041d69c98ec7b42a4a88
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, several of which point to compromised CMS upload directories, suggesting it's part of a phishing or malware distribution scheme. The presence of a "download button" heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://thepokewave.com/uploads/files/pajulamivaxidolixamamu.pdf In PDF document text
    • https://konzolstudio.ro/uploaded_files/file/sogipizoregilebowokafopiz.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161329fe381e86---85567198559.pdfIn PDF document text
    • http://packagingandfoodmachinary.com/userfiles/file/12119587133.pdfIn PDF document text
    • http://bamor.org/userfiles/file/80000105056.pdfIn PDF document text
    • https://zzhqhi.com/d/files/30306017837.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/202194225133307.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/e63e8faf976a7f5c5553c72ad75a25b7/7687003631.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8aeeaa07f---2109585080.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161336f76368d8---sibijasinibu.pdfIn PDF document text
    • https://hirurgija.me/files/doniwusadumepigujiso.pdfIn PDF document text
    • https://karate2.cdmedia.pl/userfiles/file/21964872807.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613db923276b0---nejuludagopumoduwaga.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/29822652685.pdfIn PDF document text
    • https://perfecthospitals.com/FCKeditor/file/boxozediredijap.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/687cd46bd28ba2f743c88e895494fcb4/dakugun.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/wowuviki.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/26361728384.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/tewejatolani.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210903140101_1850974164.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/tofowag.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/87401692874.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=fright+night+2011+123moviesPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA37 17264 bytes
SHA-256: 163ee084d413d79254284c3421ecb138356c369d012066924464a9f1c37d8f73
font_01_sfnt_off0000e6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C8 10856 bytes
SHA-256: b439ff1088751938025e7b38b6f3b77ee7cfed95e2c4eefa7b3d59876ac7f061
font_02_sfnt_off0000ffc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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