Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eefcdcf3d1d1585…

MALICIOUS

PDF

421.7 KB Created: 2021-08-16 05:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 59cac67e5923783f773c38a06b25429d SHA-1: a3ef72355a07df0aba3e13199d7d8f9d5f044a67 SHA-256: 1eefcdcf3d1d1585db3a9fc0fcc6fa060e9a4d6527faf9fac3283e051bee395b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. Several heuristics indicate the presence of a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7111

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hanul-muresenilor.com/wp-content/plugins/super-forms/uploads/php/files/fah900acci357p1fbmn4ev2qsv/sikebiguxuniterox.pdf In PDF document text
    • http://mackyz7automotive.com/js/upload/files/29692015733.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c08a4b09277---9874715233.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a9d5a011a---gujimedisano.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ea6be725d---sufiretatopebix.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/76487171523.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/2039192270.pdfIn PDF document text
    • https://ceccarmaramures.ro/userfiles/file/15890525095.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/cbbsahfmej4dvgulrop72qbt83/32343814953.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/jc3gthed316hrlakik6dhvktd2/81021581420.pdfIn PDF document text
    • http://friend5190.xyz/js/ckfinder/userfiles/files/xawonefisagekakoxinivowol.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/wivaxuralefazune.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/409ba03adc17e8af9bd2098c70c7bd13/85841986212.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/munm1dpa9m40eueq8c9id52075/79530994170.pdfIn PDF document text
    • http://funperm.ru/content/file/7446717541.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0f7bdd090---nuwudokenab.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/39428eadac8b01ddeca80894a5920139/70010773941.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/4ebbfa84371167007813faff089d2b11/40424253153.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3630a35a93---69040634804.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/galizosuzakufe.pdfIn PDF document text
    • https://shindah.com/images/ckeditor_img/files/35121617672.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/50e23bc1735d0576eb1af90b23a9f4de/8040794698.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/sudepej.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/50930311b180a635190a5adff6b26a72/tusojujirizevo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=6+piece+wooden+puzzle+solution+roundPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0006167d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6167D 2752 bytes
SHA-256: 5002b73d1e7ed86861f0445e4c512d2a1a34980960353de9eb185942b20695b3
font_01_sfnt_off000621d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621D6 19732 bytes
SHA-256: 3d02999da9150bd8f57d681a607b1fb71dc01abbeb957bd82d83b56afff8d619
font_02_sfnt_off000654d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00066cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CFB 10660 bytes
SHA-256: 6358d6f6b216d7e85c748a26fcc9b15dbdabfa5b7d24ac9604220217fc2379c2