Malicious PDF — malware analysis report

Static analysis result for SHA-256 aabb618d01f3d62d…

MALICIOUS

PDF

85.2 KB Created: 2021-08-15 11:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 33bfc3b45af850e980047afd867531de SHA-1: 910fc3207285769a93e03154e8f95575d4e3175f SHA-256: aabb618d01f3d62d4e4f2f59ced6708c367bfa04016542f1c1461e979cc84fe9
124 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of these links suggests an attempt to lure users to malicious or compromised sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3549

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://archism.ru/uplcv?utm_term=sample+cover+letter+for+student+visa+application+germany PDF link annotation
    • http://samuiluxurytravel.com/Uploads/file/jemetonu.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160807c313b669---tiged.pdfIn PDF document text
    • https://lecourbe.dk/userfiles/file/25514570424.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/92527691630.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/9f27cf2805c212836fd3fb672e04eb27/puromikodi.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16070f1e9b5576---44738149853.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/567a8b02e4a876e3315cad88ab2d3723/32592742459.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9cbcbf1aa---kefunupomiwigijetavimilur.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ef1d9b651---zexujadolutilifix.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/tojojofufot.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/b0c5bff613e7ea7f0753ae9bf077f917/zaparidapon.pdfIn PDF document text
    • http://linza-market.ru/upload/files/dumoxig.pdfIn PDF document text
    • http://termocity.by/pics/files/41102029792.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db1637b896---88261316947.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1b520a854ea6c75756d0e282c3e50dd0/42972925860.pdfIn PDF document text
    • http://shs67classreunion.com/clients/b/bf/bf9552935413f2527bbee995f2dfc9b5/File/bobusikatoloxovoludof.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/96367291432.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/fa98523cf3207441360e5516bcdd850d/97277241866.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a367a9e8104---35244760133.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/wujazegigatutofujevuto.pdfIn PDF document text
    • https://vansuloi.com/uploads/userfiles/file/tivazilutijif.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/2b1accb310e736cbc14e6abff696458a/redipinikibu.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/vipuzufawil.pdfIn PDF document text
    • http://stattus.com/assets/file/21164866942.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/1e0d5c7aa8552379012ef2edabd844b1/polozolunamot.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/tuxulesonezilup.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_off0001159c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159C 16444 bytes
SHA-256: 78ac7529a87f01ff13eb0c9c950e965d868e6289325aca817f9d08497f85447f
font_01_sfnt_off00013fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1