Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8809afab3ac356a…

MALICIOUS

PDF

88.7 KB Created: 2021-09-22 18:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7e4d01bfbaf6de69c642ac1119d8cffe SHA-1: e17a1293e85f540ddbff6cfc74c9b6149c8aa535 SHA-256: a8809afab3ac356a488b33a4f1d962aae323b706276e5a65b4b5ada8d7720738
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a strong attempt to create a link farm. The embedded JavaScript likely facilitates the redirection to these malicious or compromised sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ameshamagazine.com/js/upload/files/nadularilajibebutozanilo.pdf In PDF document text
    • http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/jizuwaxixuwawulo.pdfIn PDF document text
    • https://springkasteelhuren.be/userfiles/file/sebepepeze.pdfIn PDF document text
    • https://kimcert.org/E/file/74452215234.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/renelivenaduzunodo.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/foguxebebukodurafifidulu.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/15309202623.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/68394715130.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/firesebugexeda.pdfIn PDF document text
    • https://iphastkala.com/userfiles/file/27865889670.pdfIn PDF document text
    • http://cutyoursupport.com/userfiles/file/78178072822.pdfIn PDF document text
    • http://canoto.us/Images_upload/files/jaximoxigamatifeluzoraf.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16135cce61e87b---63673644049.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/17485448786.pdfIn PDF document text
    • http://mlight.cz/archiv/file/9756348567.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202109062220157665.pdfIn PDF document text
    • http://thanhcongtechtra.com/upload/files/fipamuvosaxegujes.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/v7h29kv3hhs2jt3qv282oqmaej/fogenewukotuxa.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/zagodopimofepojowa.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613f759f4235b---vimavomusafudunokif.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/pozupopaxilazurokibelepo.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/jumegebolatanikivolap.pdfIn PDF document text
    • http://bulmarconsult.com/files/38900181363.pdfIn PDF document text
    • http://xtra360.net/campannas/file/sewisani.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202109040857022753.pdfIn PDF document text
    • https://verticala.ro/images/userfiles/15600944952.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=best+free+currency+converter+app+for+androidPDF 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_off0000f347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF347 10900 bytes
SHA-256: a4a9bac929aebc842ae9d9955315ddf07473339af3329bb1e7a247a91941d199
font_01_sfnt_off00010cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D4 18368 bytes
SHA-256: d18b744a84e94f2920aa03d3143f6beba1266e26e4b2848741864ac1e0bcbf20

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