Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6e84a9e79e3bd2…

MALICIOUS

PDF

77.4 KB Created: 2021-07-26 15:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7f6ed60ded159708f03610073049dbd8 SHA-1: 5be76b0ccf455fe8c9433e7829cf5c03fb67e71f SHA-256: eb6e84a9e79e3bd205381a2b562d903b9dfa7748817a77c02fd399c2c48fcde3
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites or are hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://bagiez.com/userfiles/file/47771232470.pdf In PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/7fb371098f08cb86cdedff6d46733951/divel.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708843d0ea1---jigoferovadosasilumileliw.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/70828730066.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3227e2e7e---86513831738.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d33986f93---kizex.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/madupetazujupol.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608224d944dfc---fomavadigugo.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/tp4bm5q27chiejrqse7ckst14j/59004656756.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/nafasexowijir.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/58416326214.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/p8h8b6m2leiiflic82kt2l2810/52496163429.pdfIn PDF document text
    • http://adveotec.com/img/file/futetol.pdfIn PDF document text
    • http://rld-carbon.ru/file/61293025204.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/35115594155.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8b368cf9e---59465212158.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/53235391939.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/34225188703.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/periridobuz.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/10734176303.pdfIn PDF document text
    • http://maybomchuachay24h.com/Images_upload/files/zutaxemuzixeromow.pdfIn PDF document text
    • http://woods-china.cn/ci2/userfiles/files/20210725022442.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/60639998357.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/6b5a77bd232e08d5d345fe353f8ec17f/97161006848.pdfIn PDF document text
    • http://ssurll.com/10npq9In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=elvis+et+moi+film+complet+en+fran%C3%A7aisPDF link annotation
    • 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_off0000c6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC3 10888 bytes
SHA-256: a8546410c909551f67c5b9ac8ff3707edeb30f83177d451b5f6d2d0a08ac33ef
font_02_sfnt_off0000f7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A1 17952 bytes
SHA-256: 902e8424aab3881e78f64776c64790f8012d2a99e8132f780bc06bd5d5505636