Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7e3c64ca9dbf9d…

MALICIOUS

PDF

77.9 KB Created: 2021-09-04 17:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d34edb141813efa004ec48d64b7cb4e0 SHA-1: e3315933dc04a8add5fc8b08d1e8ff7d54832741 SHA-256: ec7e3c64ca9dbf9df35b6b2bdc0e89f0a89f8bb2c0ee3b5aca1700175ede47a4
156 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs and links pointing to compromised WordPress installations and disposable hosting. These links are likely intended to redirect users to phishing or malware distribution sites. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 https://pistant.ru/uplcv?utm_term=documentary+film+history+pdf PDF link annotation
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d39c5701bd---53715270723.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/rijerivesepugofatunesuviw.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9898801c9c---52700417177.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/16482758330.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/baf37f16b01c8ae3720432abbd25cc34/garexiwapodo.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/45585778871.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/17457129454.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b967748e00e---13436889382.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cf8009e73---susetibize.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/weker.pdfIn PDF document text
    • http://autofox.lt/ckfinder/userfiles/files/pomejisumusima.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160886a9d9af34---goxowezaxusirexejimilo.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161166a1555a45---38674051198.pdfIn PDF document text
    • http://roxburyhs1987.com/clients/63080/File/38788017272.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/4bae7ff7736766d8315ada8c888ea0c8/68774430955.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/c61334722181a916175332120b442fbc/gepelazududafaruzowusaris.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/62291637280.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8a92cee31---sexidexozewuta.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/2eue5mghfedei4eof2fkck15n6/49390741371.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/ae7941d3b27c57d5973facb49ca5f6e6/17464629889.pdfIn PDF document text
    • https://megatex.ua/images/uploads/file/53497162686.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/cae3dc3ee795f3862c3f1e650f8a6f3e/5910720650.pdfIn PDF document text
    • 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_off0000caee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE300 17504 bytes
SHA-256: 91deb76089801f879b6130fe8e993e0a89d9d1e2611b242fb4fac48775b1eabf
font_02_sfnt_off000110c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C2 11100 bytes
SHA-256: 83ffd0c382d9090a97130c6ecabcbb5b93bd2e2a20a1de73d623671952bc8a73

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