Malicious PDF — malware analysis report

Static analysis result for SHA-256 369db694b1d3b8f8…

MALICIOUS

PDF

82.8 KB Created: 2021-09-12 23:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 122f8c01d1b56a742cce3335f0812439 SHA-1: 69fa220895fee3325c9d08e98dca667c984b43ac SHA-256: 369db694b1d3b8f8f71ad9d91ae13263701a5824300d98f7ef287bd506b7350c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are likely part of a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • 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://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/71796474565.pdf In PDF document text
    • https://eurosan.pl/user_images/file/tonago.pdfIn PDF document text
    • http://saimiri.name/upload/file/144219201.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/85082034881.pdfIn PDF document text
    • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/49353269546.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/zegilap.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/bewexokunajifowiwin.pdfIn PDF document text
    • https://rafaela-motores.com/userfiles/file/tefadukaf.pdfIn PDF document text
    • https://areicon.com/images/file/pudorined.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/3366114d239f090d28fcf17434ab9426/wufivilakap.pdfIn PDF document text
    • https://irantruck.ir/data/file/30292905100.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/39767880505.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/zufuwikabugekugov.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/zizapo.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/24365777069.pdfIn PDF document text
    • http://cserepakcio.hu/xdata/file/pobotix.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/78945058636.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/xanarazuk.pdfIn PDF document text
    • https://galaxytraining.examinationonline.com/files/96287292236.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81565432863.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/736744888.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/20358352164.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/45766173861.pdfIn PDF document text
    • http://aven.su/userfiles/file/xezikewijivexejopivoxe.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/48511586249.pdfIn PDF document text
    • https://praktijk.zorglink.nl/ckfinder/userfiles/files/nalubejepiwikapu.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/28103e36a17792f5695596c1ad4fa669/40854080069.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=solving+equations+involving+algebraic+fractionsPDF 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_off0000da81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF293 18436 bytes
SHA-256: 3159ee5a63ca954357d5a284376112fe66b1d22f750daa573466f7d79c534f24
font_02_sfnt_off000122d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D4 11036 bytes
SHA-256: e907f46bca9028b303f25f1bf5b8ceb3f3f552531634c06b9ef7815c6198c7b4