Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ce578dbd635a16…

MALICIOUS

PDF

92.2 KB Created: 2021-06-28 04:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 48871558f09faf810498779dc56c99ce SHA-1: 4f17257a40040f37a519cb78c22362d60fcdb8d8 SHA-256: c1ce578dbd635a167ce2559e9f3ccb9f8662efc16214e2880c7dae7399142975
176 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs, particularly those using IP literals and compromised CMS uploads, are key indicators of this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://sunnysolutions.it/uploads/assets/file/baweniwavezad.pdf
    • http://tebsc.com/clients/84181/File/81083057413.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/7d04c0f682776a2b35632494cc1d306c/pulaf.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b87a8869f89---lunodafo.pdf
    • https://walkandsmile.com/userfiles/file/84897984727.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c77243096---94133196170.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160928b6310d0c---nakitipokedezonapodaduro.pdf
    • http://veronikavilla.hu/userfiles/file/nabijojevufetagowegi.pdf
    • https://gberwanda.com/gbe/useruploads/blogs/files/fakimewabexinogefojimikiw.pdf
    • http://lpkgoodframeupvc.com/userfiles/files/diwojixovamifawojebagiliz.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/6ce1836c41558dda471d044af14c9b42/setutesakixitafofolo.pdf
    • http://ciaooo.ru/uploades/userfiles/file/35747599624.pdf
    • http://sva-jeanroze.com/xmedia/file/tavenilububum.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/18h6hpb2b9qudt3d3mo2h6ulo3/mavixexepugodalitowemu.pdf
    • https://ises.ca/phpsites/vertical_living/uploads/file/90730174420.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/d14b666ea86d9988a5a5fe8609a6fbca/81185832075.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160838a7dddf0d---10904676225.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160ade2a0508fc---30816737158.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/f1f4ac61b7f23658907c8427d401e72d/92827962346.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070732adb53d---xeberinoposajafim.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/1ab72016608fca8fa32d1f518b8f2fdd/surejuposokan.pdf
    • http://lateonsettay-sachs.org/userfiles/file/48789722310.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/jcqt6fqk3snn7lq1uau4s6hn6t/malexudesibuzanibowawe.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae16e4d1227---luwokerijuza.pdf
    • https://ktmcollege.org/public_html/userfiles/file/fabobirewukimefati.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=every+fortnite+collab
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x106A0 16792 bytes
font_01_sfnt_off00011eb7.bin
789663d18ef2ef6125bd2962584de139866da95e89a6c66d3e43c841ad1e25eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB7 10464 bytes
font_02_sfnt_off000136a2.bin
aaa6d858a832719e4746032c8322e6db957d722cd251e29f5c3addd96d224fdb
pdf-font-stream PDF embedded font (sfnt) at offset 0x136A2 17504 bytes