Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aedc4c65bb22649…

MALICIOUS

PDF

147.9 KB Created: 2021-06-28 23:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a7424d7f8275ac5bd0cf87939233ec1f SHA-1: 27bc162dc56f4b783b2c67a56d3afe5cd6e324a7 SHA-256: 1aedc4c65bb22649566013857dc655775d6844341f68d19234ecad069eb6acda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/a64f17e6951e18d29147fa9c9c859b33/48971616360.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ua035qaj2i4jc6ijg37to6is5/tinasiviwuzobidukuwitekob.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/ca3ef23673697b917a17facbc5304763/49656706354.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a225acbdf75---43175975082.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b90a6de7f---xisunab.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703a54a6818---18517310065.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609dca38cab3c---68575252521.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebb7743df4---9207995991.pdf
    • http://foto-klub.dk/userfiles/file/71123736246.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606edae56f690---foguvobasuzokuvuner.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c463507a68c---zorewevofuna.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/8faf7649f53a5efe9fae304112fdc59a/ziwod.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/0f936a43d2dc2078fa9d315b662c3d00/49112851611.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/76e7039c00e6a67e689ef1fda4316993/36663280011.pdf
    • http://www.tramag.pl/upload/file/16877279029.pdf
    • http://altaprecision.com/userfiles/file/83884448447.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609611f8d9722---32841853655.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075a4b697d6b---balegalexiwokitof.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a207985268f---80439497913.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849fd32e2cc---88374403071.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/0c3e696a1334ced4ef994f8770a9e9dd/88872871418.pdf
    • http://etenindex.nl/images/uploads/46281468700.pdf
    • http://soft-pro.hr/upload/datoteke/18977135131.pdf
    • https://questyme.ca/userfiles/file/91539597906.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=social+security+card+template+pdf
    • 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_off0001e532.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E532 16792 bytes
font_01_sfnt_off0001fd44.bin
35e53a3d9b4aba7dbebef289b1f9a91fd1d194276a9be80995f325264a861ecb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD44 16684 bytes
font_02_sfnt_off000228a5.bin
d5e26b9fe52a514b4165154b2f0d71f91e5fa07d93a8308ca4a4b5c1cbe242c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x228A5 10968 bytes