Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94a9bf48be753b9…

MALICIOUS

PDF

83.8 KB Created: 2021-08-31 06:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1e40173fdc4d3978d254968cf3e65d99 SHA-1: 806d3d623175d28d4497208b9297152cc3531cf7 SHA-256: d94a9bf48be753b9243a1ddb80982c1fd3e79129aace4584fdac351c2df81619
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting an attempt to lure users to external sites. The presence of embedded JavaScript, along with ClamAV detection as 'Pdf.Phishing.Trojan', strongly indicates malicious intent, likely for phishing or malware delivery. The ML classifier also returned a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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://mxagproducts.com/upload/browse/file/23700602130.pdf
    • http://divorce-difficile.fr/userfiles/file/92686165873.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609407968c16d---22601859492.pdf
    • http://autowagon.it/userfiles/files/14623659416.pdf
    • https://vannordenvastgoed.nl/userfiles/file/lubexafubukuriwixuxakobi.pdf
    • https://angkalaris.com/contents//files/45244691622.pdf
    • https://giant-nano.com/app/webroot/userfiles/files/gilemadodi.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607be70c3fe5b---gabewet.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/7498a40ef76d63667f9c2ca02a3ff665/27675079224.pdf
    • http://studiogiovannone.com/userfiles/files/fiwajovakipiza.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/161150e059fde2---metemelugu.pdf
    • http://rotarycochinharbour.org/ci/userfiles/files/50143378289.pdf
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/vavojominanorivazazo.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/dce12419c4dc6b97977cfaa1a1751b5e/kixaratetabamabetewale.pdf
    • http://aolisenjiancai.com/data/files/nomonezalewujuxixotofedip.pdf
    • http://iamsong.vn/uploads/files/rimoxokobimolireg.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a524cedee0---bebarukivomubipole.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/utqgo22tvi4qvdog5j1ki4ppuh/kepevuxa.pdf
    • http://www.urbanwaterways.info/files/padufaxevirolosi.pdf
    • http://tasarimak.com/ckfinder/userfiles/files/dulusa.pdf
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/65491575768.pdf
    • https://majorsagilekvaros.hu/uploads/file/96743089972.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=number+3+in+sign+language
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e20d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE20D 16792 bytes
font_01_sfnt_off0000fa24.bin
220d152b5cd7be25eed96dd0264c3b2a3c93208d2c5cc708238ce9d54a5d8424
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA24 10620 bytes
font_02_sfnt_off00011258.bin
e446f8844fc89a646c8dfe8c1d969095d910f84cf2d2a09d13db4f48d2a65065
pdf-font-stream PDF embedded font (sfnt) at offset 0x11258 17844 bytes