Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a161f9c00b1c0c…

MALICIOUS

PDF

93.6 KB Created: 2021-07-02 04:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 134bf606aa57159874c549fa4fa4d360 SHA-1: 1db95f20df10ec49fc60cdfc9d495fa77b56a21b SHA-256: c7a161f9c00b1c0c9457ff79833492908bc10dd79cfbe1736c53608decb2b3cb
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Heuristics indicate it functions as a link farm, with multiple URLs pointing to compromised WordPress upload directories. These links likely serve as a lure to redirect users to malicious content, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4674

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 http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdedb705f67---99472268100.pdf In PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160aaae1c0f32d---boxexagigituzagonol.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/3161d778148b0c6bdb1bd56066812a7e/nasegetapuzekenumejo.pdfIn PDF document text
    • http://kururlaub-ungarn.de/bilder/files/73769645687.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083167b8dd7c---vefazuwugegogudemanofitiw.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/5954337972.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/id1e9c2ui1g4fi4ge90ip81a3m/benimadogajupid.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a51a6851e1c---78736176639.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/8qv423djimdo6d3g9vuequf1i1/1876561991.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/55612276673.pdfIn PDF document text
    • http://valeneighbors.com/userimages/30672242278.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/rsi6qp2v4ch458a6u5hleamet0/zumafedexovuzikozetejidi.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/31297567349.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/93445318415.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fd4baf38d---57858005485.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607005d71df50---3268293712.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/983de9230fa5438e1c616fa6bdbb9458/81813116763.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/12e91rr5kc2c3ikvvlm4j4ko15/pazegelime.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160838fcb4d50f---nisoxapexoturapivumun.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075741825333---topise.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/be875ec342442ab51603dad85ccbd949/64708482035.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/98537751586.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c150915b6a3---sawusi.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/razutawuvavazitis.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a122eab2ee6---94172273485.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=metal+gear+solid+portable+ops+psp+isoPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/954ebbe817b840c9469f84108c7f1594/17786084924.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001491d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491D 7160 bytes
SHA-256: fd76890284ee9fe4eaa23680a8b2116596ed4eaf1b9c873cfc6467dfdaaac202