Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae69c2fcad0b0ca…

MALICIOUS

PDF

73.3 KB Created: 2021-09-03 07:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: de96797ee96178c4b1e5592901630b69 SHA-1: 92be68d569d10abc9b8ea3a87b5897d32e2b1c08 SHA-256: 3ae69c2fcad0b0cac6551633b53a67ea8cacf5c59d32741c18ea77c293145fa8
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads, suggesting an attempt to lure users to malicious sites. The document body is unreadable, but the heuristic firings strongly indicate a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://birons.net/wp-content/plugins/super-forms/uploads/php/files/aff180cd35dde53f3fc762fc157ad25e/kepozuriteje.pdf In PDF document text
    • http://madmojo.com/fckupload/file/78213916505.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/65740809123.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d6877672f---gewiju.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609afa28c027d---nojikutavip.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3c7654bd0---59722640424.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/98809160030.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b249d288846---bodoveroji.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074502b309a9---mafubizelelot.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/6938549039.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/44752884642.pdfIn PDF document text
    • http://horgaszvelem.hu/ckfinder/userfiles/files/35537483325.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/kunujefadidedewiro.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/j59qp828svf55v8nv99a86va95/bofelolunofemuwegefes.pdfIn PDF document text
    • http://gsoutreach.net/clients/e/ea/ea4f28bd0b090870cbed8536b6d1d406/File/25578872875.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/eaapa4d3317sfm852i7phes4o4/fisisosokipiboposezeg.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/24499376730.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5ab054377---21376210073.pdfIn PDF document text
    • http://marketingnews.fr/images/file/47931965813.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/54903999735.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/memonofetevovepurinovaf.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/60271921676.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=holman+6+station+irrigation+controller+manualPDF 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_off0000bb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB8B 16812 bytes
SHA-256: b0e28421b9c3e41474c5a36f7f192e629b901f2dc8904b35cb2f7e8674180dd5
font_01_sfnt_off0000e636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE636 10832 bytes
SHA-256: 92592d52e9df9d9ce859bd394f2744a936cc823c657c475eee31aa105d3bde88
font_02_sfnt_off0000ff38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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