Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2e25ef4b536225…

MALICIOUS

PDF

93.7 KB Created: 2021-07-02 00:35:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: aae3a2eecfffbd458a44307711945603 SHA-1: 9a47c844091e9ea5dd932e693e7a917660474461 SHA-256: 7f2e25ef4b536225ea45ccefe0d3f8102e5ae6375c885fbd861b977323d27ed8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous URLs pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to lure users to malicious sites.

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 https://abofahed.com/userfiles/file/69402121325.pdf In PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/48d6dd11a235637525d537602fc1125b/1334090998.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/fubivupusak.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a13934258---3305728581.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f01d8872b5---jemiputevifavuli.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/bavofarurukonaruz.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160862dd9c2869---boxalikuf.pdfIn PDF document text
    • http://smeclassof1987reunion.com/clients/37165/File/51913667187.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/zivetefalekarerinu.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/tapazat.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b8076c390---7861069614.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/752679755.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/worevavonujanirakuvej.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/55363205479.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/mr24ihjak1nu0b54ed78bcpupc/sugikelojabexibumonovapip.pdfIn PDF document text
    • http://lobanowscy.pl/userfiles/file/81619222073.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/15578689119.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/virejewewozuvojagosun.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/53e33358fe230fb884ab66efa09d12db/nokuvevasalef.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a31979b30cc---tujudowefefuneda.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/jejefefipuzi.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/8003d4b9920cc7f6f44a44c59c72f9bf/40753205516.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=southern+taurids+meteor+showerPDF 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_off00010eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB1 16248 bytes
SHA-256: cd61ff15b574250734d05a5c3954136beb7d77ad1f7ad58f236e51e4f4d4194a
font_01_sfnt_off000138d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000150e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150E7 10728 bytes
SHA-256: 11f9e9a18321e45d2160b0d01763fee0a7a38255378c09034f62a5e1c9e6ce56

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