Malicious PDF — malware analysis report

Static analysis result for SHA-256 eddf73c640239aa4…

MALICIOUS

PDF

78.6 KB Created: 2021-09-19 22:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 476682167aeeed6477fe0b7c85a251d0 SHA-1: 87d1f717d0a33c9867613a221fdc338419ddcd27 SHA-256: eddf73c640239aa4093e232adfd7a5fbc12d503b3cb44012bd9fd0bd85135f8b
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites or disposable domains, designed to redirect users. The primary purpose appears to be to lure victims through these links, likely leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://quaisetoiles.fr/img_pages/file/12277830786.pdf In PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/vopamiz.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/xonuxaparekijasiv.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/dojebovinaduduvuxot.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16141598294410---66629422972.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/zaximuzalewufutebokox.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16130088c68122---83137097972.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/hvpm5up8cfr7mo4b9h47n21nsc/xovalapaloxadopevetaxitu.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/43542071604.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/figon.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/46981045364.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/41180875041.pdfIn PDF document text
    • http://ztracenaexistence.cz/files/content/file/futuvugikedugis.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/fagatujefasovu.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/titivurekamokamo.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/161399b9b8c753---neluxopimafa.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/wuvuzifoleketupegabigena.pdfIn PDF document text
    • http://carbonelite.ru/file/zogozezejisopiwubegi.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/96365912767.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/c107dca06f325bcedd37cc23362f6faa/42113787158.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/80260799315.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/5594527275.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/1912618761.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/77186796385.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=legend+of+zelda+the+twilight+princess+isoPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EE 19016 bytes
SHA-256: a8bc819467b2044e12e2d757294f93a392f6b304be2a60bb0ec6ff54734c423a
font_01_sfnt_off0000faea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEA 11004 bytes
SHA-256: 4c4871f298663a3c7c4752d2988622246fdff9293c632511f76dc0115dad1c5c
font_02_sfnt_off0001144f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1