Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b06abe0c1b1845f…

MALICIOUS

PDF

66.8 KB Created: 2021-07-29 21:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f57f50b8f75c96643fee4fb142066ed6 SHA-1: 9ac5a573dc02598756b826a4ded3915dafe41d3c SHA-256: 2b06abe0c1b1845f73838473b688c33964073e6d970b4f6e7f053eb9e471c496
124 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4651

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 https://cructi.ru/uplcv?utm_term=graphing+logarithmic+functions+practice+worksheet PDF link annotation
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/fadb228dc4ca44fe7c664081aaa8c2e9/savonadufalugomijodase.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/bd177a4bc4bd4b1908aec48628d48655/31700153681.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/modoxapusowadimogekim.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9d7673071---dejevapugomamigilinenosa.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bea9245824---lafomuberebufibuximij.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/5846271591.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/06/file/202106300850497157.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/50d9403f68fcbded2edebb24d7037100/9151356294.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec4b4412be---dizefakunosilewuvusitufan.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609c576f519d3---disonabitijufexigofeni.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/96712382860.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080883b9b48a---lakupuvepu.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/cafd023b07145f4328c3520020c48323/lufaligozerinizodafej.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/motifonosuviwudegagako.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/49325172056.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f0942f672---1838251165.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16089f3398fed1---zobudozofubesoji.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/9nqo3j1u9tlvtl6t96oe8vjvvl/54289740410.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba986817295---4589540269.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/juset.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/25u5eu8bg3nn13a056uie10ej5/44459123714.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ab4c4f6c4---kofigosiweporad.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/46158659f47a4158701cec04a365c716/88361813534.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/44508204b9c1bae3c4700c143ce6c7b7/zariga.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea0a37c8c7---sipup.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/magevovedov.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC08E 11244 bytes
SHA-256: 0306330d0a2d08eaa9f92d8c91758e625850caf52f4011d9a396f9326c1ef753
font_01_sfnt_off0000dad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD5 16248 bytes
SHA-256: 4ffec03dc203d1fcc90483d84624244fe430eb8782f52f6bf16ff6032752ae57