Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1fd67fbf8e87fe…

MALICIOUS

PDF

85.9 KB Created: 2021-08-26 10:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 37396a940a88b11e3d470474b9b73b37 SHA-1: 22a073ccabfb703143cd54503b699a6cb0ae036d SHA-256: 0e1fd67fbf8e87feb136f18d70ef6707079b876f5e6df228c19ec9c5b708b11f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a link farm directing users to multiple URLs, several of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the nature of the links suggests exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • 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://liur-krd.ru/userfiles/file/gawew.pdf In PDF document text
    • https://toolsatool.com/userfiles/files/79034885036.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210607171233.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/3gcodicp3osb61s9refbfkpnj6/43496555198.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/komuwosipivez.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/klj4g4c85kjh1nkhgm0hcpmif2/moxenokujumemu.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/jegogazonipuxa.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/81852491595.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/58002111771.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/0f641c14c2c202c9183670a8ca3dc457/nunijowudabudusuzug.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/19093190103.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/b5ig93e23mp671q7bt394k9ld1/37558818615.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/48631653911.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/gemafanepezomu.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/96543217394.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/f4pl02een0gjk8f3e305bladdk/66598913971.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/e80c52b2f4185c914fe9a064119d8437/jobavoninugoditeb.pdfIn PDF document text
    • http://prestizhstroycompany.ru/SITE/files/editor/file/56734953831.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607473a4000cb---ninekotumetozojujatur.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/86679083480.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/buzanalotosixem.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd9259b773---78410454692.pdfIn PDF document text
    • http://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/segere.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-06-25-08-19-00-xnZc6GWI.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/081359543961.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=acupressure+points+for+losing+belly+fatPDF 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_off0000eaa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA4 16884 bytes
SHA-256: 68c7217927893a404f50202b437be2b920a5fa1be5cf25e2b5800b975bdcf42a
font_01_sfnt_off0001168e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA5 10988 bytes
SHA-256: c5c92d5eefdc8c56b9e8cd4f7e463092372158078845e6d494bd59326d9926ba