Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1856b9c356e569…

MALICIOUS

PDF

99.7 KB Created: 2021-06-29 18:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0c29eaef54b9d86449e534153cd6467f SHA-1: 467a45d76bf2cca05aeb1bb3fcf101055308abd4 SHA-256: dd1856b9c356e569c39977604c5514073aa1285dc4a3ea71f5f9bcfe765c0864
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure as a link farm is designed to lure users to potentially malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083dd6a15e04---jejiritidudesemo.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/o42l5srg5s1s7eeudt114439u0/romepomugixej.pdf
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/26348889611.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/941ec8952bda6cdb648dce1c1a29c397/78974406434.pdf
    • http://fairway.cc/images/blog//file/wufevizajidejomezeji.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e93d6de928---kuxofekufelekufewefe.pdf
    • http://clubselectionvoyages.com/images/file/86293858813.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/0ar2kk6fat4enp267ue2hni667/78752421967.pdf
    • http://amandamaitland.com/images/file/nodazo.pdf
    • http://baaningdoi.com/file_media/file_image/file/mevufinakedopegifevup.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/0astg8ajocndvn8nhq0aactbjf/22024888132.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/1d3921c2be8492817bd45c43173e4afa/telebofaj.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/021781e2c9fcd1f0acc7c58dc13cc606/72721321555.pdf
    • http://parkwaywest1974.com/clients/861606/File/livew.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/o9t2bhs490al6o71os2va1m9d3/dexabizijisadurepisi.pdf
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/g087d4ng4jnl5n70db7gk6gcaj/12714075022.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8a0881eb9---57960484927.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/5lhrllcs5l5a08hfd63qrdp5u5/zojuzosavorube.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc77e20503---48928195450.pdf
    • http://myxroad.com/upload/userfiles/file///60284224373.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/fd5398405a5476222d0de0298ec33e5c/tibexuku.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=translate+all+the+formulaic+equations+to+word+equations
    • 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_off00011eae.bin
184ada0fd01be9f5842997c946f700a15d4d0574cc782fb051886786da0e345e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAE 17672 bytes
font_01_sfnt_off00014dc3.bin
a908155f74d5d0fc51ea5c6a9b573d70f638f2a81aa9ed1154c14718254dc7e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14DC3 11036 bytes
font_02_sfnt_off0001671b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1671B 16792 bytes