Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4e41364fd37a46…

MALICIOUS

PDF

81.2 KB Created: 2021-07-31 17:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6e3941293a92cfebc284a0c7cca3d40e SHA-1: 0b021cb00132887bd249d1c9b682b40e40f76874 SHA-256: 1e4e41364fd37a46b914e1b9368cf3dbec4bec3291c4daa05bafc13e6dd69f8c
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

Heuristics 5

  • 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
  • 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://smidgel.ru/uplcv?utm_term=105+universal+laws+pdf PDF link annotation
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/8790a9221a405b4dfea67c63bd5cb7d0/latijovi.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/14095164294.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df6f6dbab4---31811943434.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/a4fb9652d79c7e89f6278fbf0767e78f/81609170422.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/zimokifid.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/30540399502.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/ab5d7471013b0cc5424c724c29c55580/7926037840.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/nugosenifuzidiruzinixofe.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/f1d756636f16faac5678a7093ffb1145.pdfIn PDF document text
    • http://teraval.cz/res/file/76565487320.pdfIn PDF document text
    • https://aksusu.com/upload/files/64747796731.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/jaxulilujup.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/6058167e136dc364d38517dbe4a1fc6b/putabadidegusewotobamop.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/81730349070.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/22jivvm84o9lb16vj199g57c81/pufegesijamurukalisox.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b49278af2c---83662214064.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3d52c6c3c---77324189961.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/leriribuvakeguziwufab.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/giwir.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082956ca120c---91660991927.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b904fbc069fc64d795d1dcaf41e38a55/82611235212.pdfIn PDF document text
    • https://zzhqhi.com/d/files/rakewarid.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/xuteku.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EA 16616 bytes
SHA-256: 92818c4f8fc0eacadafc762aefbb55bafd31008d2b98ba5f015d7d126f0eb93f

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