Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c638aee1a11c554…

MALICIOUS

PDF

94.6 KB Created: 2021-08-24 19:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 37c31ecec2b3e40eb7895b6287a59d56 SHA-1: 9834485eec63c90735822e8aae3de15c6a4fee23 SHA-256: 2c638aee1a11c554684382d9b16302b84293dd12d27113f6d431bb73e0d84231
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs pointing to compromised WordPress sites, indicating an attempt to lure users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The presence of a link farm on disposable hosting suggests a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5914

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.
  • 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
  • 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://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f98ccd8544---kogekeregituk.pdf In PDF document text
    • http://fonnepal.org/userfiles/file/67304888043.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/wazifemogesexibo.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/99126331944.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9233d15cc8---wawisetusitelomevatuzuris.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16089199b48efb---mizuwilotovizi.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/90003032744.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/2051069873.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/3imo63ro5u5t2h2mtbrsb3be2e/wurebira.pdfIn PDF document text
    • http://www.polni.si/Images/files/79721643802.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/99762443519.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/zisugil.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/zurumemukefaxisekojuxur.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/98925760146.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160997634947f9---punozotevugifadomuz.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608759fea740f---vakumis.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e72525d058c---xobegufajijipew.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/jalelixebesa.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102ccc2caeab---83731969010.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/kuvatekituwebibenapedigar.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///34127565973.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9161a0f95---xovuvododobenerijolop.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/73575669885.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe324414564---44024903156.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=meaning+for+liaisonPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off000154d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x154D2 18960 bytes
SHA-256: 82680bae2d1ba92f1a018005c8df74b0a6c8e7bc3b4b189475ef03003de25c13
font_00_sfnt_off0000e6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C0 4304 bytes
SHA-256: 7b18254e5b713728be708298d8389a392ef2b598a0125588e9d4d4bca7f927f8
font_01_sfnt_off0000f6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DC 10284 bytes
SHA-256: b653bce6591b61a5ca8a92683d0e1c257dd29b278178448c1562883748511a47
font_02_sfnt_off00010e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E10 29464 bytes
SHA-256: 54e48caa1152170f200c099012669741932094965561cbbe21eb2a4448a9e072