Malicious PDF — malware analysis report

Static analysis result for SHA-256 776333fc4f43c62f…

MALICIOUS

PDF

85.4 KB Created: 2021-06-26 05:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bc1f10c52e0e41f84c86746f7d95f879 SHA-1: ee5637d28642be3aa54d26e5b9dfc8b43efbda19 SHA-256: 776333fc4f43c62fb197565eed458bcd1f38b5aff7c944892e5c77d11ca3340f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution scheme. The embedded URLs, particularly those hosted on compromised sites, are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ca4262b79---gobamexamizazuluxofa.pdf In PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ca124ef2f---suvopunakikaxogetodebudon.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/3d1c1662eb38b12eb71f31e81bfc2af7/64970547435.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/h3mlm7ead520ech4s1nte60itv/69922183983.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/soputujakogokudine.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/6f60fe2fbb35af74b7499e5b01e19d11/13291080082.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/02aeacb095d685e176b91cc2982ba664/50277785109.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/63138732037.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/89634492136.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/bepodovekawamamo.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/juvegeferutudubixovut.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/f2b867e1a97758d51510ceff3dd22a66/vujuxifapetewozozuvu.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a582f2d02---donakogabagajaw.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852d2f2b835---jazilixenonufe.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/jiluzig.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/gnh56478h4gvn56op2l7j19ll3/tijivofewusotukulabu.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079cf1124a27---88566906030.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/30f35238d98b5cab2486c0a6cc891539/tufojuve.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/86715365690.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac6cb060f8---luvevabuluwej.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/59491662770.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bd7d7ada8---takajemobutexaledozegip.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a32d5790992---21243516942.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=may+your+prayers+be+answeredPDF 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_off0000ebfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 10580 bytes
SHA-256: f6ba6f493d2037970e02bda17203e728cb2604117d242cca4dc8680192b28621
font_01_sfnt_off00010416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10416 16508 bytes
SHA-256: ed05d11fc87626d6aa0448087db519908595a0c7749ad417459375791074cc22
font_02_sfnt_off00012eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.