Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6565d8dad2ee0ad…

MALICIOUS

PDF

73.2 KB Created: 2021-09-13 10:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: af438bfcafb667a672840a3f29a852da SHA-1: dccebe31f6baffa41ab0ea5c86c800270470b528 SHA-256: b6565d8dad2ee0ad5756c4d8bb2363b10c2f0ebddbf0a610eefbf6796c0eba09
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads or disposable domains. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://greece-ex.com/images/blog/file/43517342213.pdf In PDF document text
    • https://distriparkbotlek.nl/userfiles/files/91913835691.pdfIn PDF document text
    • https://bor-diing.com/upload/files/wodeniwobab.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/wezizamiwa.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/36421390514.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/92975946987.pdfIn PDF document text
    • https://ubranni.com/uploader/files/tabatukopemisifewu.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/menewuvavigubil.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/80420632947.pdfIn PDF document text
    • http://videotour24.com/data/fckupload/file/88263823106.pdfIn PDF document text
    • http://savytrading.com/userfiles/file/bewuladebanexokowinagoso.pdfIn PDF document text
    • http://geoman.cz/data/file/39591739333.pdfIn PDF document text
    • https://hoangphatdanang.xetnghiemadndanang.com/uploads/image/files/luvumikudesisusubi.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6fd2cc551---tusukiliraxel.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/7f5a0a1ed13bf39ba1f99e2d8e7218fa/38555801585.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/67518613954.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/zevitunev.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/83669538562.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/51977346380.pdfIn PDF document text
    • https://bluetact.com/ckfinder/userfiles/files/rukuzamuxat.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/zitegiz.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f94f586fb2---popogekafiwerewezuna.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/wisekukile.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=keeping+up+with+the+kardashians+season+20+episode+3+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_off0000ba2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD243 11596 bytes
SHA-256: af207aeec2c4f328b4911c41725c83b0051a404df5d6326a3913a8ff70a10a9f
font_02_sfnt_off0000ed9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9E 16164 bytes
SHA-256: cf3cd0c782f05c8a1b2f3661274be5a6a79d5d2e0500646888dfdcba8383f278

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