Malicious PDF — malware analysis report

Static analysis result for SHA-256 fadcc7ebc6fee4c1…

MALICIOUS

PDF

70.7 KB Created: 2021-09-14 00:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 65f9e67be476772ca42f25fe81ea9e6d SHA-1: c6ad45ae26541b2b8677702a60b77ed10656da59 SHA-256: fadcc7ebc6fee4c132552ca3b84bd88b73dfea5184eebbbacd2a59d67f38be2e
124 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to various websites, many of which are hosted on compromised CMS platforms. The presence of these links suggests an intent to redirect users to potentially malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2573

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://onelove.cz/file/57795568566.pdf In PDF document text
    • https://dailyiat.com/html_upload/file/rufezovovebitomiwe.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/ff957f77b0ddf0279302264b09b9beb8/30740472261.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/ligivamobise.pdfIn PDF document text
    • https://mamalight.net/business_school/uploads/file/pipedima.pdfIn PDF document text
    • http://blccy.com/userfiles/files/97316838323.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/4a95548203bf60cbf38e0245c4c11dc0/gibevikekokofifewijovud.pdfIn PDF document text
    • http://giayviettri.com/img-ftec/files/werodemakejivata.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/tarulojiti.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/6e3941ba04579e330513584ecd242748/93779521020.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d8019aaee---lubobajumatemiraki.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/65582012041.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/lodowafetubasaxipijosu.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/80262063339.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c6d35cf87---meletitukuleketirafalu.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/senowosujuzifaparebi.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/71244439686.pdfIn PDF document text
    • https://ppkh.net/userfiles/file/14516033793.pdfIn PDF document text
    • http://siciny.eu/userfiles/file/74023290300.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/77669558783.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365581ac24a---belamalefiguzuduvavipev.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2126adca5---73961688075.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/nubuxuzexalafazavoje.pdfIn PDF document text
    • http://alkanboya.com/files/file///gegejimufepugojelukawer.pdfIn PDF document text
    • https://perfumes.dropship-tracking.com/userfiles/files/kakipowu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=torque+pro+unable+to+save+profilePDF link annotation
    • http://irodori.kir.jp/files/file/54168139970.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_off0000e317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE317 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2E 10768 bytes
SHA-256: ef7cd90efc19cf48540049b706456c91f22be80d4edfbcf08f24418047ba3ed6