Malicious PDF — malware analysis report

Static analysis result for SHA-256 700710e5fb11b894…

MALICIOUS

PDF

137.6 KB Created: 2021-07-21 22:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fc22baa018e8e902d40744fc246e54d7 SHA-1: 6b04d318a323b82084e05303ff5a47306cf6f17e SHA-256: 700710e5fb11b894e1a77993ed4975487c862c62f6eba72633b2ed87a9ab6779
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, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised CMS uploads and disposable domains, suggesting an attempt to lure users to malicious sites. The PDF structure itself is minimal, with the primary function appearing to be hosting these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 https://majubesar.info/contents//files/27616669611.pdf In PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc6a83ef3b---94084331530.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/121fec195efe281f24454cf525ae04be/51362541403.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/88926074233.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d5e744b0f---13901271525.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc45b00bc57---pofulegodosij.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d87a0af31---xuzixifajav.pdfIn PDF document text
    • http://tate79.com/clients/868750/File/16606608555.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/vatelidutufibazuzusasodi.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/57134899687.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c64bd6989af---dukitowikinana.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607991f30d0d4---47403115204.pdfIn PDF document text
    • http://chipmax.in/chipmax/ckfinder/userfiles/files/51058623065.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58362373664.pdfIn PDF document text
    • https://www.domosystem.gr/ckfinder/userfiles/files/20735525366.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/jogavuwom.pdfIn PDF document text
    • http://imreelectric.sk/uploads/file/mukififot.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/xafebufigere.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608707c2e72f0---lafarexejaluwigel.pdfIn PDF document text
    • http://poultech.net/d/files/13139893438.pdfIn PDF document text
    • http://accronline.com/userfiles/file/85571504803.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a27e4a0cac9---fupigufufinatolebogale.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072e30f36875---xobamirudemawi.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/danidojumanogerobugeg.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/lorukujujozexowito.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=different+types+of+culture+in+science+like+apiculturePDF 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_off0001b0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001c8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8F1 10780 bytes
SHA-256: f4357b536bfe3c49cc03874b27b5e0033da651907702fb7afe516e59a4181283
font_02_sfnt_off0001e1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E1F6 20336 bytes
SHA-256: ec4d927ad299a9da35a2e542537b507bb474a36f9dc06439017ae418b7818663

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