Malicious PDF — malware analysis report

Static analysis result for SHA-256 410af014de8147cb…

MALICIOUS

PDF

85.5 KB Created: 2021-06-28 04:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3d4209deb3e988cfa39ad72a22d88158 SHA-1: 44582b8fb69fff6e7dcc696e97a0e8639570fba7 SHA-256: 410af014de8147cb0df37dead32b055533c935bcf6bd1de7fd577cdb29c530e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to various websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to distribute malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. Although no scripts were explicitly extracted, the heuristic firings indicate the PDF is designed to redirect users to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://skyline1968.com/clients/74864/File/pevososokejulibobo.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/54f8ee8c80c38dc75276d641f8e48324/tapurumuterefimokij.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5355659975---pagenifod.pdf
    • http://begemot-rus.com/uploadfiles/file/2021051308532273499.pdf
    • https://thefencedocumentary.com/adminfiles/file/83390308973.pdf
    • https://rubin2000-distribuitorshop.ro/userfiles/file/jufuxoxolif.pdf
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14555927738.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a246c1d7e2b---34497595509.pdf
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/39ee41f6d0437ab3030084b9b987a282/70396606012.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/1ba7eec4eee4abfccdb7cbb65d175260/79528510469.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16076777c56434---fikiwigajirudidexodib.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16076d896af83c---lafifivozazofozadegoda.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7a34289f9---ragokanipelegixa.pdf
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6297552850.pdf
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/46024528714.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608916e580783---sebuwalaret.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/9eghr55irplf5pigakmmu33g8b/dabelupavetimupoxetupuza.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ec24c535b---48920027818.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1693ed7b3a---93123700078.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083733a8a3ef---38690214058.pdf
    • http://gleneaglehoa.org/images/file/69155204507.pdf
    • http://allaboutdowney.com/userimages/53366453161.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a414fd513c---28549293084.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6a2e2a47b---72057617491.pdf
    • https://nestaerospace.com/uploads/file/fevobuludixitulan.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=minecraft+for+free+1.16
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 16792 bytes
font_01_sfnt_off0001061f.bin
8689548fdec951dac3e4c85d1564ca71cd4b7fca32dddda3e7395a7cfbdaa02a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1061F 16624 bytes
font_02_sfnt_off0001314e.bin
42035c5e744c8242cd20bb26f8143605ab5b5cb193cf9212885108ee16d64d26
pdf-font-stream PDF embedded font (sfnt) at offset 0x1314E 10392 bytes