Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a4e602f92ea5ac…

MALICIOUS

PDF

70.3 KB Created: 2021-09-04 17:20:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e990d4e38db9e17b82331be73c56145d SHA-1: 687c7015a912e7fffaaeb7f840c24da5d52f375f SHA-256: 68a4e602f92ea5acd97c5c3138e6b3332306101ffd204d235e0a8544de575de3
124 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely phishing or malware delivery. The document body was unreadable, but the heuristics and URLs strongly suggest a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4796

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 http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160870284eeaad---tonurakewowezurokopofa.pdf In PDF document text
    • http://zzzwchem.com/upload/files/85708198457.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16088344c61036---fuminuxuzegedigobenofode.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/bokifatotakeno.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/nigobiropepat.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/wupejorotibefozutiwutam.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/39041962904.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d4c4a1c6e52---dipetetoparewafenutaraxef.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/23632772324.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/xufixufawadolerodupan.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a79f956aafcfa9f0387dc0656a609c80/2098534010.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe1881aecc---61313300378.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/jelukanelap.pdfIn PDF document text
    • https://medius.sk/userfiles/file/rinitira.pdfIn PDF document text
    • http://sccsfz.org/upload/2021-08/gebikanirokiwasevu.pdfIn PDF document text
    • http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/xubuzovisiles.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/2886be4ea11010622904314a0049862c/67594099097.pdfIn PDF document text
    • http://bmhs1964.com/clients/a/ae/ae3b7fe25fc1fd458a9bccd7578bee9c/File/20600720804.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610e595771f82---53723285800.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/t32t882c709mvmg71psc6rt419/kawopazes.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/40465119348.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bab55c120f1---mevom.pdfIn PDF document text
    • https://manenshop.com/upload/files/wisop.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/malaxi.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/321d5a96a379e5a8cdcd3b0a4117d98c/24318748322.pdfIn PDF document text
    • http://tebsc.com/clients/84181/File/27414353577.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=aromaticity+antiaromaticity+non+aromaticity+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_off0000d6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0E 17784 bytes
SHA-256: 59c6f515349fb4b79b5c5c13a9c3fdfe4fa01e9ff5865966ba8de8dcfcccb9f4