Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb546ef04e66ed8…

MALICIOUS

PDF

87.2 KB Created: 2021-07-03 11:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e9c3e7b31da97aa5bda571673db99dc SHA-1: d6a145e299a6d51501ba7ec9cfd465becd44da2b SHA-256: 6eb546ef04e66ed8a090f051b0a6fb490a356c0b5d59e1f820f108f2c00c48d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous external URIs and links to compromised WordPress upload storage, suggesting it functions as a link farm. These links likely lead to phishing sites or further malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=sore+roof+of+mouth+and+throat
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/vjv3482v8seuuk76iql0d8jb2r/jumoligeboxikexe.pdf
    • https://zemiigori.com/uploads/file/foguporodavesazomogij.pdf
    • http://king-pro.com/userfiles/files/93586338795.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/7bc491c925f9002fe8f61e3f74586ceb/47788597622.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/70887badccb3b430bf2faac63ae1df2e/salinogifenikokawa.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/9m0niknad4k5vkaj1nu98grs96/96575357733.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/752e07a8463c4c112f2dcb885b303020/51639873500.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/a9c77862f4f182a1501e2d50bb485c46/56199558773.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160819721a9c11---jisanurosozawuba.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757687ac7c4---fekilovagisuvejozikuga.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/fndsaok2ggt7gqk9k83eqq2d41/mefimovulemodabotenol.pdf
    • http://abwpetersburg.com/uploads/files/waxupugorebawiz.pdf
    • http://laiyi-art.com/userfiles/file/xupibotazagowati.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160844825aecd3---43010576016.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/15116051924.pdf
    • https://pharma-tools.eu/galeria/file/posil.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093b8fcdc03d---vofufebux.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d3244a45d---lebirigaraxupiwodevem.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa167c04c5c---74003875563.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c675894c1---50829131921.pdf
    • http://medicapoland.pl/uploaded/file/25200199194.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/fa9c3103c1a266ca7d8ebf6fc598c00a/gevifomixanuni.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_off0000f2c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 16792 bytes
font_01_sfnt_off00010adf.bin
bc1321b4ff6f162dc27781fbc74d384cd27940917c3d53cdd77da81f68312161
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADF 10488 bytes
font_02_sfnt_off0001228c.bin
6ec0e0d04b1e0570679c466becb4360cf84be0850e7c3cba009d818f00148218
pdf-font-stream PDF embedded font (sfnt) at offset 0x1228C 17372 bytes