Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffcfe72f156385e3…

MALICIOUS

PDF

95.2 KB Created: 2021-06-27 07:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0119ece34c197e429786819dba0a755 SHA-1: 8197ba0bdef1ee4c4c4513b86429566f73866366 SHA-256: ffcfe72f156385e3022be3742a9740a00b125ec430ef1bb234d417da08b579c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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.
  • 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 https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16090a3b960be4---33115414240.pdf
    • http://georgekoldun.com/var/upload/file/retirinoxesurijo.pdf
    • http://brmhn.com/userfiles/file/20210524043149_9ec3fn.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/34fe5fc01d2d7c46d3c2a620997b5ab3/memijozarekirakowaj.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e53e594800---26196784434.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/d10bc2e713547a21ac18f24276c32202/nenetiwolerufis.pdf
    • https://tranhtreo.com/images/ckeditor/files/75950068276.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814c4a8a6e9---33629260361.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0ec072089---xijosenurukunirixino.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbc7f5e179---buretejekizibutina.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/1udaaj0nftp95ckq699mh10261/bukoboto.pdf
    • https://whiteplacard.com/UserFiles/file/gapodutebefamimez.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b094fa25af---tixikivisusulanol.pdf
    • http://pronobile.de/catalog/file/biragasexotananol.pdf
    • https://unserbiokorb.ch/userfiles/file/53004223551.pdf
    • http://cukiernia-waltar.pl/qcms/userfiles/file/sobalog.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d60b87e1ac---10621761984.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/fbdd3d15edc3c3ff25245f81384f9857/kadobefadoduwejoveteremaj.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/ca243d675bb07cb608396406504b8e07/tilalemumijarutus.pdf
    • http://proxima-design.cz/files/file/97916404343.pdf
    • https://bishopsalamatkhokhar.org/userfiles/file/64958136699.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/mnpttkrfh8ibiqaj53cu234ild/84301528832.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/c3af9f3ab64dd7266e7003fbad202d1a/zerezano.pdf
    • https://motelandratecuci.ro/userfiles/file/48910589386.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c851bc8c025---fafeberapezigotevekidu.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f95e25e12f---8470867615.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=the+first+website+ever+created
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010865.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10865 16792 bytes
font_01_sfnt_off00012077.bin
0081e2d8a1f986f7f31f8e02bf9ba3c89eb052f918ea6fc0c69c88ba6828457e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12077 17104 bytes
font_02_sfnt_off00014d32.bin
da2eae0e007bf9729695628af2f59990526d605b9b7843b45cbb95ae610631bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D32 10560 bytes
font_03_sfnt_off0001657d.bin
c737c1571b827a9af515084efd4d135d2c05ce8763284746c5506df3322eddb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1657D 1664 bytes

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