Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ed16e2375d88e6…

MALICIOUS

PDF

80.0 KB Created: 2021-09-02 13:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 95c8a015e57c5320a7836ff1f235a7e8 SHA-1: ec382bf7416b28f3fa71e181b594af76beffa515 SHA-256: 29ed16e2375d88e63ae89a652c6c15bb775d53469b5c67ca493732b88a52d6f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV heuristics strongly indicate this PDF is malicious, specifically flagged as a phishing trojan. The document contains a link farm pointing to multiple compromised CMS upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malware distribution or credential harvesting campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://voxel-avocats.fr/uploads/file/99202350471.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afcf731aee0---73889625655.pdfIn PDF document text
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/48098083872.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd122131ed---puzosemowigegax.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/gih8gioq452fcl7q1h5h4tiodo/7282428189.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/1c2d4dbe5cea0f9a4ada7514349d23ea/48927815187.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/v9t0dm571608f0o17d4a7f4sgo/70252577781.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/12020499402.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/73501f1d2dc3830336f1b79babb8506f/19166757923.pdfIn PDF document text
    • https://attack.lt/images/files/kibawifovegaxerimu.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/xezijefibepefurote.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/wanorefer.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/ba54f02f8472647df6cd2abc19f385ae/16119303208.pdfIn PDF document text
    • http://susasoft.com/upload/userfiles/files/nomivimadokubepanawetarot.pdfIn PDF document text
    • https://digireg.lu/upload/bobazevuxokazufuxipumow.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/jixewadezozela.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/vidude.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/vetamajad.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3e80e5c49---pemaz.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/ritufexefogidu.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d60d62b88a0---wopuze.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/4d3ea72b6cf4a165589f2f6fee8d146f/sexilesidovazuselubefela.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/jolubabuzivosibepi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=use+of+computer+in+education+field+pdfPDF 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_off0000d5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AA 10888 bytes
SHA-256: aa40331f9939479c31caf43fb73fa25d8b27d726ab25477d1492925cc3861acc
font_01_sfnt_off0000eed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED3 16932 bytes
SHA-256: aa0bd07bc175acb02e34d202e8866e3d188ddcacf1197910dea258311d40ff22
font_02_sfnt_off00011acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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