Malicious PDF — malware analysis report

Static analysis result for SHA-256 1834eb56d6d5ac84…

MALICIOUS

PDF

73.3 KB Created: 2021-09-04 22:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e30f0dc1999465cd40a0d7fea27904e0 SHA-1: b94cba77ea4b6a610b22688efce71417844513bc SHA-256: 1834eb56d6d5ac84942a58364d78d6a32834c6567665d349fa7fdf0f67dbd2e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads, suggesting a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c302de43fc2---84762885584.pdf In PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/wezenobajixak.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/4144429511.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/778d84b0fc456d6a176d45c9ff58d1a1/zirepodi.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/57662715912.pdfIn PDF document text
    • http://lrpharmaceutical.com/upload/files/deribabiwevaja.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/fegibozapezawivizakugapuw.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/79683253082.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/pukovujixaxused.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dff1784e71---zukajoz.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/2dee53e46710707fbea07db4730bdd2f/77292925479.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6bd03a75ac---18811930926.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/l6j2seoh9lkjorgef6s1qf5tne/titexazijekowi.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/bogamemej.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/23637821293.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/livabegitepivupiwit.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/lezonefopadubelefuleked.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/bovoxol.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/5ebe50f4cc60499fa670efc03621769e/fasutikuzoxapupuk.pdfIn PDF document text
    • http://hyderabadibiryanicorner.com/admin/images/file/52808298261.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/k4bm8a3cfujc8pcjjcaa600mul/kowipijexupu.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/lumasuloxigosapax.pdfIn PDF document text
    • http://ewtch.com/upload/files/40926937693.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/7389efd0f9903b6ac4649fa509e44723/37937445696.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/6u0c5vsbbjfht59oj3e00ob7ff/raketolutudigele.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=join+to+pdf+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_off0000bfff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFF 16012 bytes
SHA-256: 874e709572ec256edea07136ec0f5b1e90f2c925bf48399713aab4069e6e5ee7
font_01_sfnt_off0000e945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE945 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001015c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015C 10108 bytes
SHA-256: c0e8c1a5600dc8de0e8e0926a9cf8f3834f1d070a8bddcb672e9fb05558a84d9

Open this report in the interactive analyzer, or submit your own file for analysis.