Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c69d0b397e13c4…

MALICIOUS

PDF

80.0 KB Created: 2021-07-20 05:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f04a51ae50a61c3e006646aaacd09e59 SHA-1: 43851885f7a635680d9a960426a30e1191085477 SHA-256: 14c69d0b397e13c4ded0ddd632cf85c1ca51051b397484aaabd7cd17b8772bf4
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL analysis and heuristic firings.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • 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
  • 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://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/d8894b3db9f846df60b88cde83473311/sariputim.pdf In PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/31d6309eea89ad2dffe9f11dcdeaa0e7/gutigulixajewetapibagape.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd8fe66a31---78618051041.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f2c4864bc---36815961465.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/092f68f6227f0f41076a6f1d4ac0db12/94542612990.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/53750929654.pdfIn PDF document text
    • https://amblamy.ee/upload/file/vilizopepebunumusugevu.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/matibudebilipi.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/408ajmihfcpljm139a1nq93our/98836853003.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/58847237145.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/vivigawovudiwipizexina.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bc782136d---timebuzogupewusevereku.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/62929609277.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609859a564bea---bibozopafodevubodujejulu.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe4bb34b8f---luxik.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/899026a11d44028c0cdc5eeb0e961fae/29553175340.pdfIn PDF document text
    • http://koslita.eu/ckfinder/userfiles/files/15128598645.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/86454502701.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/113a0c7e33727dc19195d5ad9def7d73/87717319400.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/e50a174fd2f0c5e5a0e2ea838181b156/xawaw.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/bigiveren.pdfIn PDF document text
    • https://media-get.com/userfiles/files/fugejexubitop.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/balor.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f3495bc41be---98943982241.pdfIn PDF document text
    • https://patc.fr/imagesfile/95465239802.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=powerpoint+interactive+pdfPDF 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_off0000efbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBD 10552 bytes
SHA-256: 908c89f4e8279dd4ea48485b5342c4480dbaddcfc8fc3b0fb137259d7854fbd3
font_01_sfnt_off000107f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F5 16972 bytes
SHA-256: c90c2311438c065d509bd0ef0db2f4cdc32ba70860038216522229f67bd1b25a