Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd13cd2303d79012…

MALICIOUS

PDF

122.2 KB Created: 2021-09-19 04:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: aa35ab275d2f41551048d295515e28ac SHA-1: b9a3c81dae52ca3b4c028a1048ac8bb3dbe6def1 SHA-256: fd13cd2303d7901235d70b6d9d91453ade57afafd17a06a7028696b2b28632b4
124 Risk Score

Malware Insights

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

The PDF file contains a link farm directing users to multiple external URLs, with several hosted on compromised CMS platforms. The ClamAV detection indicates this is a known phishing or trojan variant. The embedded URLs suggest an attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3704

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://allcreaturesinc.com/files/files/50826116150.pdf In PDF document text
    • http://0vote.com/ckfinder/files/mawufuwobejuvanef.pdfIn PDF document text
    • http://image.dlib.vn/libedu/news/bachviet/20210916/file/jubupapepupebepev.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ninu92p3tgv9shibiekn2duqlm/24143360684.pdfIn PDF document text
    • http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/potatiwoxusigejivujo.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16132bde7d1103---91283120203.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/sedelimediseve.pdfIn PDF document text
    • http://placidlakes.com/larpm/uploads/file/wuwotarunor.pdfIn PDF document text
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/nabusunajotoxotese.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/23194690606.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/99466707787.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///25064598034.pdfIn PDF document text
    • http://jainfarms.com/uploads/komonutifawupel.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/merexazopinopewuzinivew.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/60016744063.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/48173530466.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2b647ef03---89367770051.pdfIn PDF document text
    • http://dichvubaove.online/upload/files/mologokiwuzis.pdfIn PDF document text
    • http://cleversystems.ru/userfiles/file/giwamuxujigetaluta.pdfIn PDF document text
    • https://inwestorfinanse.pl/userfiles/file/regazutivizi.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/76722893943.pdfIn PDF document text
    • http://upakuika.com/img/file/71829432905.pdfIn PDF document text
    • https://elger.cz/fckphotos/file/jalovebajulalupoweposezi.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/dumekizikitenogugukis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=sexual+words+that+start+with+kPDF 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_off00018e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E21 18756 bytes
SHA-256: 68e6a89783fd67b357a88f87d233150954c3a8768d3b1bc29bab7581bafe9051
font_01_sfnt_off0001becd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BECD 10696 bytes
SHA-256: cac5c85c7ada7024cc0e6ad382281f94ad30de65d4df9d1ecaffe7752f8f6917

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