Malicious PDF — malware analysis report

Static analysis result for SHA-256 16fbcc09600365cb…

MALICIOUS

PDF

90.5 KB Created: 2021-07-18 11:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e245caa4682bd17f856cbbfd899ee384 SHA-1: d60b95bdd8aab885a19f5492825c360e9530cf4d SHA-256: 16fbcc09600365cb44fedcc4b25f62915eb88cfb1a98270165ea4a1b1c1f06fa
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised WordPress installations or disposable domains. This structure is characteristic of a link farm used to distribute phishing content or malware. ClamAV detection and ML classification further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

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://www.cenlajobinator.com/siteuploads/editorimg/file/27376097946.pdf In PDF document text
    • https://airbays.com/userfiles/file/40296381994.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/57477701897.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/tufitap.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/14dede6b61c1628fa57006503c4d277e/36989532116.pdfIn PDF document text
    • http://amandamaitland.com/images/file/86024568139.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f851c4a26c---40036345364.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762a59e3605---48874934086.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/9j13res4n74amoj00felqal7b5/vareputigasusajeber.pdfIn PDF document text
    • https://premiumtrade.ro/ckfinder/userfiles/files/tovawazakemasugukanobuni.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/b9f9d0f7d664e313d714d5b98fbed393/metapinizefinexixiximodom.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b764002e9e---30005902202.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/nefijikixugozefoli.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/de8d82e80b081ba824f5aae11c5d9f89/wijitalor.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d46ad7af472---givekesekizenujuda.pdfIn PDF document text
    • http://carsongrad75.com/clients/3/35/35717660c32d3dd9b0ffde8f33a19d23/File/35132009934.pdfIn PDF document text
    • http://faradbox.pl/files/file/29737925737.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/229c1deeae98d0a91c618734f3e6f118/jopuzixaleri.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3c2bb648a---97886374552.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9ce60d857---75175692753.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/bugujijarafidekaz.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819583200f4---suxoliz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=avoidance+conflict+examplePDF 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_off0000ff99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000117b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B0 10660 bytes
SHA-256: 02f95ca6983f93b00a5620680fbe64a0366e771a8bfaf62e46196b6a5b4cb70d
font_02_sfnt_off0001301c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301C 17280 bytes
SHA-256: 1948c1284f3df27cbf88fba035d72d8c7050c40b10f55bfa5d77b2d1e3dbdd94

Open this report in the interactive analyzer, or submit your own file for analysis.