Malicious PDF — malware analysis report

Static analysis result for SHA-256 330dae218f66ff1b…

MALICIOUS

PDF

71.6 KB Created: 2021-09-11 02:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9e408ef7bbf28bf56d398c75f2165dda SHA-1: ee4ab6e314bbc2becd431f45d8c92305688275c3 SHA-256: 330dae218f66ff1b0dfd28d1ecfe9b74644df770914140f10d838ac327399a10
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and link farm characteristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://www.itidharamshala.in/images/uploads/files/bugex.pdf In PDF document text
    • https://ladangmimpi2.com/contents/files/zozilewe.pdfIn PDF document text
    • http://intertermo.nl/userfiles/file/wowirudakiwuwugawaganamor.pdfIn PDF document text
    • http://boldogelet.hu/media/30942793411.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/buvuzigawuridofasufotibin.pdfIn PDF document text
    • https://ivanamihic.com/files/72397338678.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/17605839465.pdfIn PDF document text
    • https://kentacademymiango.com/userfiles/file/44199193191.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/42217657282.pdfIn PDF document text
    • http://hennel.hu/sources/elemek/file/xozowoton.pdfIn PDF document text
    • https://zibarajabi.com/cache/fck_files/file/vewomanopuguzex.pdfIn PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/3398596537.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/28610053989.pdfIn PDF document text
    • https://www.gpaci.org.br/cms/ckfinder/userfiles/files/17485051337.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/62771647830.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b056fd21c4---nakupud.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/6dcd81fd588316cdbc771c92ff90e3f4/nagujodulotani.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/161336e19c921d---fojigizilokive.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/161395c2b51957---mezasunekewamim.pdfIn PDF document text
    • http://wxbeimei.cn/upload/ckimg/files/202109050538495483.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/161361bf50be2a---12177444973.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/25115082265.pdfIn PDF document text
    • http://cuacuonductudong.com/upload/files/28144829233.pdfIn PDF document text
    • https://casalindasbakery.com/ckfinder/userfiles/files/37520363286.pdfIn PDF document text
    • https://stw-nowogard.pl/download/file/levonufumezivetu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=puppy+town+free+downloadPDF 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_off0000b706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB706 10532 bytes
SHA-256: 93e11eba51769e547bbfd25bbb6b107e895f658080db44bfefe1af117c0ed061
font_01_sfnt_off0000cf3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3D 16412 bytes
SHA-256: 6d350ccd94d38824bc1aecba377511116aed5a7b9a13564172ae1d3cd47875b1
font_02_sfnt_off0000f87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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