Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e06bda04efb14b9…

MALICIOUS

PDF

111.2 KB Created: 2021-07-30 13:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4d45040bd590717c7ca457ceeb4b9d2b SHA-1: 7cc6d4737d9f7da2e683c8a9bd8f315f229de986 SHA-256: 8e06bda04efb14b980b144fbdc60c57d5bdc9504a108e9dfe338aaa3290ba0c9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous links pointing to compromised WordPress sites suggests a link farm designed to host and distribute further malicious content, likely for phishing or malware delivery. The heuristic 'SE_DOWNLOAD_BUTTON' also indicates a lure to trick users into downloading files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7c10265aa---4850653619.pdf In PDF document text
    • http://jnafarms.com/clients/864068/File/zegonig.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/3ncmu9emja10qvrddgie3bq62d/rexibatilunopo.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c1f7d24df---8726008803.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f7d91b93c---geduxokefepovej.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/dudixurelir.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b9a9ff4778fb763a911fadd2a86960c9/53543968640.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/7f172c4ee3016a7fd9d4d83a4d3cd765/benudenomu.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/binajakexedanudujovej.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/95843299683.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/nld47vkddso2rgtukvd187go06/jubetirulisuwuv.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b586a72ab64---58020062330.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0624/a7eab491a8c1726fe19c127f97e27d27.pdfIn PDF document text
    • http://beergolfers.com./blog/images/file/xuwugiw.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/4e86a48be4f1dc49df4c29398b123664/pulusivewixigikeladixuwow.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/vawilofuvekid.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/24057614909.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cefeb0f34c---83933675768.pdfIn PDF document text
    • http://webelievedin1984.com/clients/6/67/676624d6593aa512bfa6e10e765af00e/File/mokolejadumajesozupem.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/1162378362.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/80075141597.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/6ad443aec64475689deb6c189d312a8b/kukopunaxid.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da32db13adb---56297702488.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/julojelakexazenufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=hooked+on+101+easy+piano+classics+pdfPDF 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_off00014e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E66 10788 bytes
SHA-256: ccc513d899b2d16007f84b2c6721e5a9a14d3ba44c5f9af4185f87afc53c8650
font_01_sfnt_off0001675f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1675F 17548 bytes
SHA-256: 9df3089212546be9643ea992d503b0a2979cd37c4fa337bc2402cd84c4fc46ce
font_02_sfnt_off00019580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19580 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1