Malicious PDF — malware analysis report

Static analysis result for SHA-256 a72f03aacad3102b…

MALICIOUS

PDF

74.8 KB Created: 2021-09-12 09:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dcec96aac8cff691cf4b9c783b90ee5e SHA-1: 060b1040c79a495388452aafac2803de7b4343a1 SHA-256: a72f03aacad3102b58f01df374d7156f698002201a772d12ff6e316ffa94ed27
124 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to potentially compromised websites or disposable hosting, indicative of a link farm. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely phishing or malware delivery through these links. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4921

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://raffaelecavazzoni.com/userfiles/files/zinorukinumuv.pdf In PDF document text
    • http://www.vnos.vn/app/webroot/uploads/files/kuvodusidoz.pdfIn PDF document text
    • http://murzilka.biz/images/uploads/file/nunelitaf.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/riselumamufasa.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16139c74d84434---bifobiganolisu.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/99203061771.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/hdffv1lca7tilfpit3f39bvrip/86409726232.pdfIn PDF document text
    • http://nktrading.qa/file/files/jekariwunalagojinuzok.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/jotadivukinavixopufaxono.pdfIn PDF document text
    • https://casaalu.com/luutru/files/mujafixanune.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///riregagifobowarewop.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/99305896.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/72693523155.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/30045234498.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/11191603444.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/67501607798.pdfIn PDF document text
    • https://curtain.jinware.com/upload/files/vuwomop.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/burirakexeveboju.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name/files/kepubuwefor.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f72c04ad5d---duzelatovelowa.pdfIn PDF document text
    • https://blogsma.com/files/menevo.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/wotidopopupimobajanos.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/87332846474.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+do+you+convert+mp3+to+mp4PDF link annotation
    • 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_off0000cfad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BF 18008 bytes
SHA-256: 9d2e17de53d6327b52ce3b7de74d06d28e7ad656a3c57e30bc7d9f6b178f790a
font_02_sfnt_off000116ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CA 10816 bytes
SHA-256: 9360d188c61740f13b16bbbf77c13ffe588739398e94404ca2daa952b4cf5fbf