Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2826f70e418f10…

MALICIOUS

PDF

111.5 KB Created: 2021-06-28 04:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 412fd41b9da39049ef2ad40395a3318c SHA-1: 46a6e7f63abe82b34ec9035cf12f340ed64f62e8 SHA-256: 9b2826f70e418f10a4181cda8b8372a3714454d49314ce011294ca2636c1481a
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting domains. These links are likely intended to lure users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://baugeraeteverleih.de/benutzerdateien/76860770817.pdf In PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/eaed023c04a502666a3fe39d81745927/karewixisir.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/gijakifibanawurupek.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d452d8f9e0---votan.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/03f8d761f3d5accc66add76077fb6331/botejoguvefusawonadoj.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/dalibodaruranavejasugal.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/cs6fa4a8q7skb4ejhj5ngp7f6a/sewuzaxorapuz.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/nizisebobu.pdfIn PDF document text
    • https://tomas-music.com/contents//files/nakadok.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/75242618664.pdfIn PDF document text
    • https://soechi.net/userfiles/file/sezakubonakofividiwosa.pdfIn PDF document text
    • http://klefmarken.se/upload/file/pezepavixanutalomivik.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2d5c0fe15---susowa.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2fefb61007b69b6a509b2db8af44c82d/nokajitejixuzogikibidiwo.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c43035d505a---sebuv.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ad1ba5792---9029299602.pdfIn PDF document text
    • https://ancoraeducacion.com/images/7571068121.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/lalozazowuko.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/f0fc1e23a448356b64442826e5331ffa/wotilapeki.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f5910e3e7---jirorazuxapixe.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/majobujos.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/gidibusewir.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/ziwovumasapad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=repent+nearest+meaningPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B89 10472 bytes
SHA-256: dd1b33ada4f9c009b05892857926b22109857ad756fb7af632745f4a3f5f12f4
font_01_sfnt_off00016354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16354 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B66 20288 bytes
SHA-256: 7806b847329efa0ab4bba51438ab201e257e79cf37a403cdc9a630b7627242fe

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