Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f273d80c799694…

MALICIOUS

PDF

71.9 KB Created: 2021-08-25 02:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 69d723ec90975ac42b56cb47d4b725f8 SHA-1: 2df5455319c8365946759f886f18aa9f71138690 SHA-256: e9f273d80c799694011b868ca5612451742a573720f4999495edbfe9344492bf
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Heuristic analysis indicates the PDF contains a link farm pointing to multiple domains, some of which appear to be compromised WordPress installations or hosted on disposable domains. The embedded URLs suggest an attempt to lure users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4060

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://noithatkuongthinh.com/uploads/files/pelukusidi.pdf In PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2aaf2ba4---68659793949.pdfIn PDF document text
    • https://kuepancong.com/contents//files/84550727419.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210811022054.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/livolirilesalid.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/23491613506.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/42698488265.pdfIn PDF document text
    • http://drironcat.com/images/file/90984277613.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/69518980895.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/67892578645.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/42654323210.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb06475421---83209510578.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/89339176913.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca09289419---popixakudodugofuni.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/aq9q1ckssmmldctor13pqigmni/xevikovozopalobariline.pdfIn PDF document text
    • http://espicycooking.com/files/file///nikodali.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/kimagabez.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/18359147421.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/zuwimaporu.pdfIn PDF document text
    • http://446888.top/userfiles/file/37276335957.pdfIn PDF document text
    • http://unseretochter.com/images/file/xonulifavativivoxenotan.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/87991743219.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/99418854c928830026b8fb6931ed7a19/gipebuzilipeko.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c75f73b5f8---54062469502.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/49378733605.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=critical+path+method+pptPDF link annotation
    • 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_off0000cdc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC9 16092 bytes
SHA-256: 158be6a858e9832973767e9094fb33c780c8b1d955e253238728667bb9cba36b
font_01_sfnt_off0000f789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF789 10536 bytes
SHA-256: 3ebea7482d8db11605c45220febd870966697563e168ac53167ed1e71293bd6c