Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db5d367e9e92faf…

MALICIOUS

PDF

70.7 KB Created: 2021-09-11 06:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c74cd4e7d484d06b9ca68a5db2e2d063 SHA-1: 520e0df6db73be7a88b0fdcb3ad267be8891ffbf SHA-256: 7db5d367e9e92faf8836a7aa6935cd6ab75bf4166258aa8485408d7f221c66f5
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 file contains a link farm pointing to multiple compromised WordPress sites, suggesting it's designed to redirect users to potentially harmful content. The presence of numerous embedded URLs, many hosted on disposable domains, further supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0d09ecd6a---94044814478.pdf In PDF document text
    • https://pecintajp.com/contents/files/ganazojowozetipeko.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/62a541f35c6b99e61addcef8f0a5a627/gatebebilozi.pdfIn PDF document text
    • http://nato-denkmal.de/uploads/file/roboxoxefidiloti.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202109060053405680.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/batozopafuxatigemani.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/2992431190.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210903_C9B6DAE330C49F18.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/toxasegizisak.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/20316778167.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec285ee348---10064893885.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xavipenutugezikesudam.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/dotosawariraga.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/30326752179.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/fikubapofawar.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/161360e9d5100d---14026860942.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/37939071281.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/negewekemapotezus.pdfIn PDF document text
    • https://nordiskvillaventilation.dk/userfiles/file/wazolo.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/87779949049.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/85943319688.pdfIn PDF document text
    • http://macierz-grodziec.org/files/file/wumajebivowafivubanavukes.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/zesasovikopuduzu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=fall+guys+for+android+download+freePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F0 15664 bytes
SHA-256: 22f33f6d02e7b5e547842057701e4ca595857702da45687611c0ef5cab3c8eec
font_01_sfnt_off0000dc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8E 10708 bytes
SHA-256: 8aa11024f271f1a13ed126a0c2c24c5c4f1cd2e040ded043d52fba6df089df66
font_02_sfnt_off0000f51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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